Respuesta :

starshoppingwmeplz12

Answer:

180=100+3x+x

180=100+4x

180-100=100-100+4x

80=4x

20=x

preranaxettri

Answer:

20

Step-by-step explanation:

3x + 100 + x = 180

or, 4x = 180 - 100

or, 4x = 80

or, x = 80/4

or, x = 20

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