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194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) - 25 = 145
194 - 24 : ( 4 . x - 3 ) = 145 + 25
194 - 24 : ( 4 . x - 3 ) = 170
24 : ( 4 . x - 3 ) = 194 - 170
24 : ( 4 . x - 3 ) = 24
4 . x - 3 = 24 : 24
4 . x - 3 = 1
4 . x = 1 + 3
4 . x = 4
x = 4 : 4
x = 1
- Hok t -
194 - 24 : ( 12 : 3 . x - 3 ) - 25 = 145
194 - 24 : ( 12 : 3 . x - 3) = 145 + 25
194 - 24 : ( 12 : 3 . x - 3 ) = 170
24 : ( 12 : 3 . x - 3 ) = 194 - 170
24 : ( 12 : 3 . x - 3 ) = 24
12 : 3 . x - 3 = 24 : 24
12 : 3 . x - 3 = 1
12 : 3 . x = 1 + 3
12 : 3 . x = 4
3 . x = 12 : 4
3 . x = 3
x = 3 : 3
x = 1
-HT-
B)
194−24:(12:3×x−3)−25=145
⇔194−24:(4×x−3)=145+25
⇔194−24:(4×x−3)=170
⇔24:(4×x−3)=194−170
⇔24:(4×x−3)=24
⇔4×x−3=24:24
⇔4×x−3=1
⇔4×x=1+3
⇔4×x=4
⇔x=4:4
⇔x=1
Vậyx=1
Trả lời:
\(194-24\div\left(44x-3\right)-25=145\)
\(\Leftrightarrow194-24\div\left(44x-3\right)=170\)
\(\Leftrightarrow24\div\left(44x-3\right)=24\)
\(\Leftrightarrow44x-3=1\)
\(\Leftrightarrow44x=4\)
\(\Leftrightarrow x=\frac{1}{11}\)
Vậy \(x=\frac{1}{11}\)
\(x\times\frac{1}{3}\div\frac{2}{9}-x\div5=1\frac{2}{5}\)
\(\Leftrightarrow x\times\frac{1}{3}\times\frac{9}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{3}{2}-x\times\frac{1}{5}=\frac{7}{5}\)
\(\Leftrightarrow x\times\left(\frac{3}{2}-\frac{1}{5}\right)=\frac{7}{5}\)
\(\Leftrightarrow x\times\frac{13}{10}=\frac{7}{5}\)
\(\Leftrightarrow x=\frac{14}{13}\)
Vậy \(x=\frac{14}{13}\)
a)
x × 1 1 2 = 1 4 5 − 2 5 x × 3 2 = 9 5 − 2 5 x × 3 2 = 7 5 x = 7 5 : 3 2 x = 14 15
b)
x × 0 , 75 + x × 0 , 25 = 5 x × 0 , 75 + 0 , 25 = 5 x × 1 = 5 x = 5 : 1 x = 5
194 - 24 : (12 : 3 x x -3) -25 = 145
194 - 24 : (4 x x -3) -25 = 145
24 : (4 x x -3) = 194 - 145 + 25
24 : (4 x x -3) = 24
4 x x -3 = 24 : 24
4 x x -3 = 1
4 \(\times\)x = 1 + 3
4 \(\times\)x = 4
x = 4 : 4
x = 1
`194 - 24 : (12 : 3 x xx -3) -25 = 145`
`24 : (4 xx x-3) = 194-(145+25)`
`24 : (4 xx x-3) = 24`
`4 xx x -3 = 1`
`4 xx x=1+3`
`4 xx x=4`
`x=4:4`
`x=1`.