Question

Resolva as equações do 1 grau abaixo:

a) x + 6 = 5

b) 3x - 4 = 2x + 8

c) 6x = 2x + 4

d) 5x - 3 + x = 2x + 9

Answer 1

a) x + 6 = 5
x = 5 - 6
x = -1
b) 3x - 4 = 2x + 8
3x - 2x = +8 + 4
x = + 12
c) 6x = 2x + 4
6x - 2x = 4
4x = 4
x = 4/4 
x = 1
d) 5x - 3 + x = 2x + 9
5x + x - 2x = 9 + 3
4x = 12
x = 12/4
x = 3