Question

X supra 7 = 10 supra 14 x=?

Answer 1

$\frac{x}{7}$ = $\frac{10}{14}$
x · 14 = 10 ·7
x ·14 = 70
x = 5

Answer 2

$\frac{x}{7} = \frac{10}{14} \\ x*14=7*10 \\ 14x=70 \\ x= \frac{70}{14} \\ x=5$