Question:
Solve each of the following equation and also check your result in each case:
$\frac{3}{4} x+4 x=\frac{7}{8}+6 x-6$
Solution:
$\frac{3}{4} x+4 x=\frac{7}{8}+6 x-6$
or $\frac{3}{4} \mathrm{x}-2 \mathrm{x}=\frac{7}{8}-6$
or $\frac{3 x-8 x}{4}=\frac{7-48}{8}$
or $\frac{-5 x}{4}=\frac{-41}{8}$
or $-40 \mathrm{x}=-164$
or $\mathrm{x}=\frac{-164}{-40}=\frac{41}{10}$
Check :
L.H.S. $=\frac{3}{4} \times \frac{41}{10}+4 \times \frac{41}{10}=\frac{123}{40}+\frac{164}{10}=\frac{123+656}{40}=\frac{779}{40}$
R. H.S. $=\frac{7}{8}+6 \times \frac{41}{10}-6=\frac{7}{8}+\frac{246}{10}-6=\frac{35+984-240}{40}=\frac{779}{40}$
$\therefore$ L.H.S. $=$ R.H.S. for $x=\frac{41}{10}$