Question

determine o valor de x :

Answer 1

a) 80+60+x=180
140+x=180
x=180-140
x=40

b) 2x+80+40=180
2x+120=180
2x=180-120
2x=60
x=60/2
x=30

c) 2x-30+x+10+x=180
4x-20=180
4x=180+20
4x=200
x=200/4
x=50

d) 70+52+x=180
122+x=180
x=180-122
x=58