Question

resolva as equaçoes sendo u = z a) x -8 = - 10 b) x + 1 = 9 c) 7 x - 2 - 5 x - 18 d) 4 ( x + 1 ) = 12 e) 4 x - 10 = 2 x + 2

Answer 1

16x - 1 = 12x + 3
16x - 12x = 3 + 1
4x = 4
x = 4 : 4
x = 1
Confirmando:
16 * 1 - 1 = 16 - 1 = 15
12 * 1 + 3 = 12 + 3 = 15