Question

Resolva as seguintes equações: a) X + 5 = 8 b) 15 = X + 20 c) 4 = X – 10 d) 7 = X + 8 e) 0 = X + 12 f) X + 15 = 4X + 3

Answer 1

Resposta:

a) X=3 (5+3=8)

b) X = -5 (20 + (-5))

c) X=14 (-10 + 14 =4)

d) X=-1

e) X = -12

f) X+ 15 = 4X +3

X - 4X = +3 -15

3X = -12

X = 12÷3

X=4