tim x
X/3 x 4 + X x 1/2 =23,1 x X
X + 1,23 : 3 = 1,845
X x 1/4 + X x 1/5 + X x 2= 19,6
X/2 x X + X x4 =23,1
X + 3 1/2 + 20 =24 1/4 ( hỗn số x a/b Nha )
a) \(x+1,23\div3=1,845\) c) Không rõ
\(x+0,41=1,845\)
\(x=1,845-0,41\)
\(x=1,435\)
b) \(x\times\frac{1}{4}+x\times\frac{1}{5}+x\times2=19,6\) d) \(x+3\frac{1}{2}+20=24\frac{1}{4}\)
\(x\times\left(\frac{1}{4}+\frac{1}{5}+2\right)=19,6\) \(x+\frac{7}{2}+20=\frac{97}{4}\)
\(x\times\frac{49}{20}=19,6\) \(x+\frac{47}{2}=\frac{97}{4}\)
\(x=19,6\div\frac{49}{20}\) \(x=\frac{97}{4}\div\frac{47}{2}\)
\(x=8\) \(x=\frac{97}{94}\)
X + 1,23 : 3 = 1,845
X + 0,41 = 1,845
X = 1,845 - 0,41
= 1,435
X x 1/4 + X x 1/5 + X x 2 = 19,6
X x ( 1/4 + 1/5 + 2 ) = 19,6
X x 2,45 = 19,6
X = 19, 6 : 2, 45
X = 8
tìm x:
\(x^5-\frac{1}{2}.x+7.x^3-2x+\frac{1}{5}.x^3+3.x^4-x^5+\frac{2}{5}+15=23,1\)
x5 - 1/2 * x + 7 * x3 - 2x + 1/5 * x3 + 3 * x4 - x5 + 2/5 + 15 = 23,1
=> (x5 - x5) + (7 * x3 + 1/5 * x3) + (-1/2 * x - 2x) + 3 * x4 + 2/5 + 15 = 23,1
=> 0 + (36 * x3) /5 + (-5x)/2 + 3 * x4 + 15,4 = 23,1
=> (36 * x3) /5 + (-5x)/2 + 3 * x4 = 23,1 - 15,4 = 7,7
=> ............
Tìm x:
a) \(\frac{x}{2}\)x 3 + X x 4 = 23,1 x X
b) X x \(\frac{1}{4}\)+ X x \(\frac{1}{5}\)+ X x 2 = 19,6 x X
Tìm x:
a) \(\frac{x}{2}\)x 3 + X x 4 = 23,1 x X
b) X x \(\frac{1}{4}\)+ X x \(\frac{1}{5}\)+ X x 2 = 19,6 x X
tim x
(x+5,2)*2,1=23,1
tim x
(x+5,2)*2,1=23,1
x + 5,2 = 23,1 : 2,1
x + 5,2 = 11
x = 11 - 5,2
x = 5,8
\(\left(x+5,2\right)\times2,1=23,1\)
\(x+5,2=23,1\div2,1\)
\(x+5,2=11\)
\(x=11-5,2\)
\(x=5,8\)
(x+5,2)*2,1=23,1
x+5,2=11
x=11-5,2
x=5,8
a) X/2 x 1.4 + 1/5 + X x 2 = 23,1
b) X x1/4 + X x1/5 + x x2 = 19,6
b, \(x\)x \(\frac{1}{4}\)+ \(x\)x \(\frac{1}{5}\)+ \(x\)x 2 = 19,6
\(x\)x (\(\frac{1}{4}+\frac{1}{5}+2\)) = 19,6
\(x\)x\(\frac{49}{20}\)= 19,6
\(x\) = \(19,6:\frac{49}{20}\)
\(x=8\)
1 Tính giá trị của biểu thức
a), 48,6+32,5:0,1x1,2 ; b), ( 1/5x2/3+1/4x3/2):1/2
2 Tìm x
X/2 x 3 + X x 4 = 23,1 ; X x 1/4 +X x 1/5 +X x 2 = 19,6
\(\frac{x}{2}\)*3 +x * 4 =23,1
\(\frac{x}{2}\cdot3+4x=23,1\)
\(\Leftrightarrow x\cdot\frac{3}{2}+4\cdot x=23,1\)
\(\Leftrightarrow x\left(\frac{3}{2}+4\right)=23,1\)
\(\Leftrightarrow x\cdot\frac{11}{2}=23,1\)
\(\Leftrightarrow x=4,2\)
\(\frac{x}{2}\times3+x\times4=23,1\)
\(\left(\frac{x}{2}\times2\right)\times\left(3:2\right)+x\times4=23,1\)
\(x\times1,5+x\times4=23,1\)
\(x\times\left(1,5+4\right)=23,1\)
\(x\times5,5=23,1\)
\(x=23,1:5,5\)
\(x=4,2\)
Chúc bạn học tốt !!!
chỉ tớ bài này dc ko
y : 2 x 3 + y x 4 = 23,1
mik xl mik chịu thôi!Mik tính ra thì là -0,225
y : 2 x 3 = 23,1 :4
y : 6 = 5.775
y = 5.775 x6
y = 34.65
mình ko chắc lắm bạn tính lại nha
y : 2 x 3 + y = 23,1 : 4
y : 2 x 3 = 5,775
y : 2 = 5,775 : 3
y : 2 = 1.925
y = 1,925 x 2
y = 3,85