Question

What is the value of x in the proportion below?

5/7 = x/20

Answer 1

`(5)/(7)=(x)/(20)` Multiply 20 on both sides

`(20)(5)/(7) =(x)/(20)(20)`

`(20(5))/(7)=x`

`(100)/(7)=x`

Answer 2

Multiply both sides by 20

5/7 × 20 = x

Simplify 5/7 × 20 to 100/7

100/7 = x

Switch sides

x = 100/7