Respuesta :

Answer: x=3

Explanation:
7x-1=20
Add 1 to both sides
7x=21
Divide both sides by 7
X=3
Isolate the x in the equation.

First add both sides by one.

7x - 1 + 1 = 20 + 1

Simplify.

7x = 21

Divide each side by 7.

7x/7 = 21/7

Simplify.

x = 3