Question

Calcule o valor X nas figuras

Answer 1

2x - 30 + x =90
2x+x - 30 =90
3x - 30=90
3x = 90 + 30
3x= 120
x = 120 ÷ 3
x = 40

Answer 2

a)
2x - 30 + x = 90
3x = 120
x = 120/3
x = 40

b)

7x + 2x = 180
9x = 180
x = 180/9
x = 20