Question

Resolva as equações dadas abaixo:
a)2 x + 3 = x -1
b)5 + 2 x = x + 1
c)3.( x + 1) - (x + 3) = 10

Answer 1

A)
$2x - x = - 3 - 1 \\ x = - 4$
B)
$2x - x = 1 - 5 \\ x = - 4$
C)
$3x + 3 - x - 3 = 10 \\ 2x = 10 \\ x = 5$