x + 12 =(-5)-x
x + x = -5 - 12
2x = -17
\(x=-\frac{17}{2}\)
x + 5 = 10 - x
x + x = 10 - 5
2x = 5
\(x=\frac{5}{2}\)
12-x=x+1
12 - 1 = x+x
11=2x
x=\(\frac{11}{2}\)
14+4x=3x-20
4x-3x=-20-14
x=-34
x + 12 =(-5)-x
x + x = -5 - 12
2x = -17
\(x=-\frac{17}{2}\)
x + 5 = 10 - x
x + x = 10 - 5
2x = 5
\(x=\frac{5}{2}\)
12-x=x+1
12 - 1 = x+x
11=2x
x=\(\frac{11}{2}\)
14+4x=3x-20
4x-3x=-20-14
x=-34
a)-5.(-x+7)-3.(-x-5)=-4.(12-x)+48
b) (-x-7)-5.(-x-3)=12.(3-x)
c)-2.(15-3x)-4.(7x+8)=-5-9.(-2x+1)
d) (-3x-7) - 4.(-2x-11)=7.(4x+10)+9
Tìm x
a,-5×(-x+7)-3×(-x-5)=-4×(12-x)+48
b,-2×(15-3x)-4×(-7x+8)=,-5-9×(-2x+1)
c,7×(-x-7)-5×(-x-3)=12×(3-x)
d,5×(-3x-7)-4×(-2x-11)=7×(4x+10)+9
Dạng 3: vận dụng các quy tắc: qt chuyển vế,qtdấu ngoặc, nhân phá ngoặc
a)3x –10 = 2x + 13
b) x + 12 = -5 –x
c) x + 5 = 10 –x
d)6x + 23= 2x –12
e) 12 –x = x + 1
f) 14 + 4x = 3x + 20
g) 2.(x-1) + 3(x-2) = x -4
h) 3.(4 –x) –2.( x-1) = x + 20
i) 4.( 2x + 7) –3.(3x –2) = 24
k) 3(x –2) + 2x = 10
Bài 1:
a)-2x-3.( x-17 )= 34-2.( -x+25 )
b)17x+3.( -16x-37 )= 2x+43-4x
c){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} = 55
g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]
Bài 2:
a)-5.( -x+7 )-3.( -x-5 )=-4.( 12-x )+48
b)7.( -x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
c)-2.( 15-3x )-4.( -7x+8 )=-5-9.( -2x+1 )
d)5.( -3x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
e)4( x-2 )2-13=( -3 )2.2-11.( -3 )
f)-52-( 2x-1 )3=( -13 ).( -3 )
van dung cac quy tac chuyen ve,quy tac dấu ngoặc,nhã phá ngoặc:
a, 3x-10=2x+13
b, x+12=-5-x
c, x+5=10-x
d,6x+2^3=2x-12
e,12-x=x+1
g, 2.(x-1)+3.(x-2)=x-4
f, 14+4x=3x+20
g, 2.(x-1)+3.(x-2)=x-4
f, 4.(2x+7)-3.(3x-2)=24
3(4-x)-2.(x-1)=x+20
3(x-2)+2x=10
tìm X
1/4+2.(3.x-2/3)=1
(1/2+2X). (2x-3)=0
(4x-5).(5/4.x-2)=0
1/9-(2.x+1/2)mũ 2=0
9.(3x-1/2)mũ 2 =4
1/2.x+2/3.x-1=-10/3
X+1/12=-3/9
Vận dụng các quy tắc: quy tắc chuyển vế, quy tắc dấu ngoặc, nhân phá ngoặc làm bài sau.
a) 3x - 10 = 2x + 13
b) x + 12 = - 5 - x
c) x + 5 - 10 - x
d) 6x + 2^3 = 2x - 12
e) 12 - x = x + 1
f) 14 - 4x = 3x + 20
g) 2 . ( x - 1 ) + 3 ( x - 2 ) = x - 4
h) 3 . ( 4 - x ) - 2 . ( x - 1 ) = x + 20
n) 135 - | 9 - x | = 35
o) | 2x + 3 | = 5
i) 4 . ( 2x + 7 ) - 3 . ( 3x - 2 ) = 24
k) 3 ( x - 2 ) + 2x = 10
GIÚP MÌNH VỚI MỌI NGƯỜI!
a) 16 - 18/x| = -8 -14|x|
b) 5 x|+7.(2/x|-3) =4.(x-4)+25
e) 15-3|4x +2| = 3 8) 18 -4.(6-2|x|) = - 3.(4|x|+5)+29
8) 27-5/x -10 = 4|x-10| - 18
h) 510 + 3x|-21 = 7- 2|15+3x|
c) 43x +2|-16= 20
d) 8|x - 1|-4 = 12+6|x-1|
giúp em với
Tìm số nguyên x biết
a.-5.(-x+7)-3.(-x-5)=-4.(12-x)+48
b.-2.(15-3x)-4.(-7x+8)=-5-9.(-2x+1)
c.7.(-x-7)-5.(-x-3)=12.(3-x)
d.5.(-3x-7)-4.(-2x-11)=7.(4x+10)+9
f.-2.(x+3)-15=3.(4+2x)+7
giúp tớ nhé tớ đang cần gấp help me