Question

determine o valor correto de x
a.18x-43=65
b.23x-16=14-18x
c.10x-5-5x=6x-6-20

Answer 1

Respostas:
a) 18x - 43 = 65
    18x = 65 + 43
    x = $\frac{108}{18}$
    x = 10

b) 23x - 16 = 14 - 18x
    23x + 18x = 14 + 16
    41x = 30
    x = $\frac{30}{41}$

c) 10x - 5 - 5x = 6x - 6 - 20
    10x - 5x - 6x = - 6 - 20 + 5
    10x - 11x = - 26 + 5 
    - x = - 21 . (-1)
     x = 21