Question

a)-3(3x - 42) = 2(7x-52)
x + 3 x + 2
+
2 3
II
- 1
2​

Answer 1

Resolvendo a primeira sentença:

-3(3x-42) = 2(7x-52)

-9x+126=14x-104

-9x+126 +104 = 14x-104 +104

-9x + 230 = 14x

-9x + 230 +9x = 14x + 9x

230 = 23x

230 /23 = 23x /23

10 = x