Respuesta :

Answer:

16

Step-by-step explanation:

Simplify 100+x+4x to 100+5x.

100+5x=180

Subtract 100 from both sides.

5x=180−100

Simplify 180−100 to 80.

5x=80

Divide both sides by 5.

x=80/5

Simplify 80/5 to 16.

x=16

good job