Question

resolva as seguintes equação do 1 grau na incógnita x.
$5 \times (x + 1) - 2 \times ( - 3x - 5) = 10 \times (3 - 2x)$
$5 \times (x + 3) - 2 \times (x - 1) = 20$
$2 \times (x + 1) = 3 \times (2 - x)$
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Answer 1

Resposta:

5 × (x + 1) - 2 × ( - 3x - 5) = 10 × (3 - 2x)

5(x + 1) - 2(-3x - 5) = 10(3 - 2x)

5x + 5 + 6x + 10 = 30 - 20x

11x + 20x = 30 - 15

31x = 15

x = 15/31

5 × (x + 3) - 2 × (x - 1) = 20

5(x + 3) - 2(x - 1) = 20

5x + 15 - 2x + 2 = 20

3x = 20 - 17

x = 3/3

x = 1

2 × (x + 1) = 3 × (2 - x)

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

2x + 2 = 6 - 3x

2x + 3x = 6 - 2

5x = 4

x = 4/5

Espero Ter Ajudado !!