Question

Simplifique e resolva as equações a seguir:

A) 2(3-x)+4x=26
B) 5x+4-3(2-x)=12+7x
C) x-x+5(2+3)=10x(1:2)
D) 2x-3x+7(x+2)=14

Answer 1

A) 2(3 -x) + 4x = 26
6 - 2x + 4x = 26
- 2x + 4x = 26 - 6
2x = 20
x = 20/2
x = 10

b) 5x + 4 - 3(2 - x) = 12 + 7x
5x + 4 - 6 + 3x = 12 + 7x
5x + 3x - 7x = 12 - 4 + 6
x = 14

c) x - x + 5( 2+3) = 10x( 1 : 2)
x - x + 10 + 15 = 10x : 20x(aq tem algum erro)

d) 2x - 3x + 7 ( x + 2) = 14
2x - 3x + 7x + 14 = 14
2x - 3x + 7x = 14 - 14
6x = 0
x = 0/6
x = 0