Question

pvr me ajudem é mega importante ​

Answer 1

A)X+35+40=180
X+75=180
X=180-75
X=105

B)3x+5x+x=180
9x=180
X=180:9
X=20

C)X+30+X+60=180
2x+90=180
2x=180-90
2x=90
X=90:2
X=45