Question

ajudem aqui matemática

Answer 1

a)180=90+5x x=18
3.18=54
2.18=36

b)180=5x+2x+40+3x+10 x=130/10 x=13
2.13+40=66
3.13+10=49
5.13=65

c)180=2x+3x+2x+40
140=7x x=20
2.20=40
3.20=60
2.20+40=80