Question

what is the value of x in the proportion below?

5/7 = x/20

Answer 1

Multiply both sides by 20

5/7 × 20 = x

Simplify 5/7 × 20 to 100/7

100/7 = x

Switch sides

x = 100/7

Answer 2

$\frac{5}{7}=\frac{x}{20}$    Multiply 20 on both sides

$(20)\frac{5}{7} =\frac{x}{20}(20)$

$\frac{20(5)}{7}=x$

$\frac{100}{7}=x$