Question

z-18=-1/2
alguém me helpa

Answer 1

Z - 18 = -1/2

MMC; 2

2Z - 2.18 = - 1
2z = 36 - 1
z = 35/2

Answer 2

z- 18 = 1/2  mmc  = 2

2(z) -2 (18) = 1(1)

2z - 36 = 1

2z =36 +1

2z = 37

z= 37/2