Resposta:
4x+40+2x+20+6x+60=180
4x+2x+6x=180-40-20-60
12x=60
x=60/12
x=5
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Resposta:
4x+40+2x+20+6x+60=180
4x+2x+6x=180-40-20-60
12x=60
x=60/12
x=5