0.16 (5x-2)=0.4x +7
Question:

0.16 (5x-2)=0.4x +7

Solution:

Given, $0.16(5 x-2)=0.4 x+7$

$\Rightarrow$ $0.8 x-0.32=0.4 x+7$

$\Rightarrow$ $0.8 x-0.4 x=0.32+7$ [transposing $0.4 x$ to LHS and $-0.32$ to RHS]

$\Rightarrow \quad 0.4 x=7.32$

$\Rightarrow$ $\frac{0.4 x}{0.4}=\frac{7.32}{0.4}$ [dividing both sides by 0.4]

$\therefore$ $x=18.3$