Respuesta :

McCold

Answer:

x = 20

Step-by-step explanation:

x + 3x + 100 = 180

4x + 100 = 180

       -100    -100

_________________-

4x = 80

/4 .   /4

__________

x = 20

Hope this helps :)

(If you need it explained in words just let me know)
4x+100=180
4x=80
x=20
hope this helped

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