Respuesta :

Hello,

The sum of 2 times a number and 7 equals 5.

Let s call it x

The sum of 2 times a number and 7 equals 5.

2x

The sum of 2 times a number and 7 equals 5.

2x+7

The sum of 2 times a number and 7 equals 5.

2x+7=5

voila!