X : 0,1 + X x 7 = 34
X x 10 + X x 7 = 34
X x ( 10 + 7 ) = 34
X x 17 = 34
X = 34 : 17
X = 2
X : 0,1 + X x 7 = 34
X x 10 + X x 7 = 34
X x ( 10 + 7 ) = 34
X x 17 = 34
X = 34 : 17
X = 2
\(x:0,1+x\times7=34\)
\(x:\frac{1}{10}+x\times7=34\)
\(x\times10+x\times7=34\)
\(x\times\left(10+7\right)=34\)
\(x\times17=34\)
\(x=34:17\)
\(x=2\)
X x 10 + X x 7 = 34
X ( 10 + 7 ) = 34
X x 17 =34
x = 2
2 nha chị ^-^