Question

5x-1= 3x+11

2x+8= x+13

12-7+4x=25

4x+10=45-3x​

Answer 1

Explicação passo-a-passo:

a)

$5x - 1 = 3x + 11 \\ 5x - 3x = 11 + 1 \\ 2x = 12 \\ x = \frac{12}{2} = 6$

b)

$2x + 8 = x + 13 \\ 2x - x = 13 - 8 \\ x = 5$

c)

$12 - 7 + 4x = 25 \\ 12 - 7 - 25 = - 4x \\ - 20 = - 4x( - 1) \\ 20 = 4x \\ x = \frac{20}{4} = 5$

d)

$4x + 10 = 45 - 3x \\ 4x + 3x = 45 - 10 \\ 7x = 35 \\ x = \frac{35}{7} = 5$

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