Question

Solve the following equations:
$21-3(x-7)=x+20$

Answer 1

Given equation is $21-3(x-7)=x+20$

$\Rightarrow 21-3x+21=x+20$

$\Rightarrow 42-3x-x-20=0$

$\Rightarrow -4x=-22$

$\Rightarrow x=\frac{22}{4}$

$\therefore x=\frac{11}{2}=5.5$

Hence, $x=5.5$ is the solution of the given linear equation.