Question

Preciso resolver estas duas equações:

a) 2(2x+1)-(x+1)=5

e

b) 3(x+1)+2(x-1)=32

Answer 1

2 . (2x + 1) - (x +  1) = 5

4x + 2 - x - 1 = 5
3x  + 1 = 5
3x = 5 - 1
3x = 4
x = 4/3

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3.(x + 1) + 2.(x - 1) = 32

3x + 3 + 2x - 2 = 32
5x + 1 = 32
5x = 32 - 1
5x = 31
x = 31/5

Answer 2

Vejamos: a) 2.(2x + 1) - (x + 1) = 5 4x + 2 - x - 1 = 5 4x - x = 5 - 2 + 1 3x = 4 x = 4/3 b) 3.(x + 1) + 2.(x - 1) = 32 3x + 3 + 2x - 2 = 32 3x + 2x = 32 - 3 + 2 5x = 31 x = 31/5