Question

determine o valor de z

Answer 1

3x = 90 -2x

3x + 2x = 90

5x = 90

x = 18

z + 15 = 90 -2x

z + 15 = 90 -2 . (18)

z = 90 - 36 - 15

z= 90 - 51

z=  39