(2x+5)(4x+3)-8x(x-3)=10
C1.10x2=6x+8
C2.23x+10=23+13x
C3.9x-6=4x+1
C4.15x-12=11x+15
C5.21x+9=19-11x
C6.15+16x=8-3x
C7.19-4x=8x+23
C8.51-10x=3x-21
C9.8-6x=11-4x
C10.2(3x+4)-3(1-2x)=8x+10
C11.5(3-4x)-4(2x-5)=9-10x
C12.3(5x-6)-2(2x-5)=11x-10
C13.10x+5(3x-2)=25-10x
C14.6(2x-3)+3(3-5x)=8x-9
C15.3(4x-2)+2(6-2x)=10-6x
C16.5(3-6x)-4(2-2x)=4x-9
B2:tìm cặp số nguyên x, y thỏa mãn
X y+2x+y=0
nhiều quá bạn ơi , mk nghĩ bạn nên tách ra rồi hãy đăng lên
Bài 1:
16:
=>15-30x-8+8x=4x-9
=>-22x+7=4x-9
=>-26x=-16
=>x=8/13
15: \(\Leftrightarrow12x-6+12-4x=10-6x\)
=>8x+6=10-6x
=>14x=4
=>x=2/7
14: \(\Leftrightarrow12x-18+9-15x=8x-9\)
=>-3x-9=8x-9
=>x=0
13: \(\Leftrightarrow10x+15x-10=25-10x\)
=>25x-10=25-10x
=>35x=35
=>x=1
12: \(\Leftrightarrow15x-18-4x+10=11x-10\)
=>11x-8=11x-10(loại)
Tìm x biết:
a) x(x-3)+2x-6=0
b) (x+1)2-4(x+1)=0
c) (2x+5)(4x+3)-8x(x+3)=10
a: \(x\left(x-3\right)+2x-6=0\)
\(\Leftrightarrow\left(x-3\right)\left(x+2\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)
b: \(\left(x+1\right)^2-4\left(x+1\right)=0\)
\(\Leftrightarrow\left(x+1\right)\left(x-3\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\x=3\end{matrix}\right.\)
Giải pt sau:
a, 3 - 4x( 25 - 2x ) - 8x2 + x - 300
b, 2( 1 -3x )/5 - 2+ 3x/10 = 7- 3( x + 1)/4
c, 5x + 2 /6 - 8x - 1/3 = 4x + 2/5 - 5
d, 3x + 2/3 - 3x + 1/6 = 2x + 5/3
Help me
a. \(3-4x\left(25-2x\right)-8x^2+x-300=0\)
\(\Leftrightarrow3-100x+8x^2-8x^2+x-300=0\)
\(\Leftrightarrow-297-99x=0\)
\(\Leftrightarrow x=3\)
Vậy \(n_0\) của PT là: x=3
b. \(\Leftrightarrow\frac{\left(2-6x\right)}{5}-2+\frac{3x}{10}=7-\frac{3x+3}{4}\)
\(\Leftrightarrow\frac{\left(4-12x\right)}{5}-\frac{20}{10}+\frac{3x}{10}=\frac{\left(28-3x-3\right)}{4}\)
\(\Leftrightarrow\frac{\left(-16-9x\right)}{10}=\frac{\left(25-3x\right)}{4}\)
\(\Leftrightarrow-64-36x=250-30x\)
\(\Leftrightarrow-6x=314\)
\(\Leftrightarrow x=-\frac{157}{3}\)
Vậy -\(n_0\) của PT là: \(x=\frac{-157}{3}\)
c. \(5x+\frac{2}{6}-8x-\frac{1}{3}=4x+\frac{2}{5}-5\)
\(\Leftrightarrow-3x=4x-\frac{23}{5}\)
\(\Leftrightarrow7x=\frac{23}{5}\)
\(\Leftrightarrow x=\frac{23}{35}\)
Vậy \(n_0\) của PT là: \(x=\frac{23}{35}\)
d. \(3x+\frac{2}{3}-3x+\frac{1}{6}=2x+\frac{5}{3}\)
\(\Leftrightarrow\frac{5}{6}=2x+\frac{5}{3}\)
\(\Leftrightarrow x=-\frac{5}{12}\)
Vậy \(n_0\) của Pt là: \(x=-\frac{5}{12}\)
Thực hiện phép tính:
(2x + 3) (x - 5) + 2x(3 - x) + x - 10
(6x^3y^2 - 8x^2y^3 + 4x^3y^3) : 2x^2y^2
\(\left(2x+3\right)\left(x-5\right)+2x\left(3-x\right)+x-10\)
\(=\left(2x^2+3x-10x-15\right)+\left(6x-2x^2\right)+x-10\)
\(=-25\)
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
giải các phương trình sau:
a) 4x.(2x+3) - x.(8x-1)= 5.(x+2)
b) (3x-5).(3x+5) - x.(9x-1) = 4
c) 3 - 4x . (25-2x) = 8x^2 + x - 300
d) 2. (1-3x/5) - 2+3x/10 = 7-3.(2x+1)/4
e) 5x + 2/6 - 8x - 1 /3 = 4x + 2 /5 - 5
f) 5x - 4/2 = 16x + 1/7
g) 12x + 5 / 3=2x - 7/4
h) 3t - 8/12 = 5-t /8
i) 5u + 6/15 = u - 4 /10
k) 3.(x-11)/4 = 3. (x+1) - 2.(2x+ 5)/10
l) 14 và 1/2 - 2. (x+3)/5 = 3x/2 - 2. (x-7 )/3
m ) 2x -5 / 6 - x +2 = 5x - 3/ 3 - 6x - 7/ 4 + x
n) x-4/5 + 3x - 2/10 - x = 2x-5/3 - 7x+2/6
mình đang cần gấp
a,\(4x\left(2x+3\right)-x\left(8x-1\right)=5\left(x+2\right)\)
\(< =>8x^2+12x-8x^2+x=5x+10\)
\(< =>13x=5x+10< =>8x=10\)
\(< =>x=\frac{10}{8}=\frac{5}{4}\)
b, \(\left(3x-5\right)\left(3x+5\right)-x\left(9x-1\right)=4\)
\(< =>9x^2-25-9x^2+x=4\)
\(< =>x=4+29=33\)
c,\(3-4x\left(25-2x\right)=8x^2+x-300\)
\(< =>3-100x+8x^2=8x^2+x-300\)
\(< =>x+100x=3+300\)
\(< =>101x=303< =>x=\frac{303}{101}=3\)
d,\(2\left(1-\frac{3x}{5}\right)-\frac{2+3x}{10}=7-\frac{3\left(2x+1\right)}{4}\)
\(< =>2-\frac{6x}{5}-\frac{2+3x}{10}=7-\frac{6x+3}{4}\)
\(< =>-\frac{24x}{20}-\frac{4+6x}{20}+\frac{30x+15}{20}=5\)
\(< =>\frac{30x-6x-24x+15-4}{20}=5\)
\(< =>\frac{11}{5}=5< =>11=25\)(vo li)
e, \(\frac{5x+2}{6}-\frac{8x-1}{3}=\frac{4x+2}{5}-5\)
\(< =>\frac{25x+10}{30}-\frac{80x-10}{30}=\frac{24x+12}{30}-5\)
\(< =>\frac{24x+12+80x-10-25x-10}{30}=5\)
\(< =>79x-8=150\)
\(< =>79x=150+8< =>x=\frac{158}{79}\)