Question

Determine x nas equações abaixo:
    a) 5x + 8 = - 7x + 32
    b) - 4x - 7 =  -10x + 35
    c) 3( x + 2) = 5( -2x + 2)
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Answer 1

Resposta:

Explicação passo-a-passo:

5X + 8 =  - 7X + 32

5X + 7X = 32 - 8

12X = 24

X  = 24/12

X = 2

- 4X - 7 = -  10X + 35

- 4X + 10X = 35 + 7

6X = 42

X = 42/6

X = 7

3(X+2) = 5(-2X +2)

3X + 6 = -10X + 10

3X + 10X = 10 - 6

13X = 4

X = 4/13

Answer 2

a) 5x + 8 = -7x + 32
5x + 7x = 32 - 8
12x = 24 => x = 24/12 => x = 2

b) -4x -7 = -10x + 35
-4x + 10x = 35 + 7
6x = 42 => x = 42/6 => x = 7

c) 3(x+2) = 5(-2x+2)
3x + 6 = -10x + 10
3x + 10x = 10 - 6
13x = 4 => x = 4/13