Question

resolva as seguintes equações

a) 2x/5 + 8 = x/3 - 12

b) -3x + 42 = 4x

Answer 1

a)

(2x + 8) × 3 = (x - 12) × 5

6x + 24 = 5x - 60

6x - 5x = -60 - 24

x = -84

b)

42 = 4x + 3x

42 = 7x

42/7 = x

6 = x