Question

Find the value of x in the equation $\frac{3}{7}+x=\frac{17}{7}$.

Answer 1

$\frac{3}{7}+x=\frac{17}{7}$
$\Rightarrow x+\frac{3}{7}-\frac{3}{7}=\frac{17}{7}-\frac{3}{7}$ [subtracting $\frac{3}{7}$ on both sides]
(1 mark)
$\Rightarrow x=\frac{17-3}{7}$
$\Rightarrow x=\frac{14}{7}$
$\Rightarrow x=2$
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