Question

5×-3×-30+10=0
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2×=10

Answer 1

Primeira equação:

$5x - 3x - 30 + 10 = 0$

$2x - 20 = 0$

$2x = 20$

$x = \frac{20}{2}$

$x = 10$

Segunda equação:

$2x = 10$

$x = \frac{10}{2}$

$x = 5$

Answer 2

Resposta:

Explicação passo-a-passo:

$5x-3x-30+10 = 0 \\\therefore (5-3)x - 20 = 0\\\therefore 2x - 20 = 0\\\therefore (2x - 20) + 20 = 0 + 20\\\therefore 2x = 20\\\\\therefore \dfrac{2x}{2} = \dfrac{20}{2}\\\\\therefore \dfrac{2}{2}x = 10\\\\\therefore x = 10$

E

$2x = 10\\\\\therefore \dfrac{2x}{2} = \dfrac{10}{2}\\\\\therefore \dfrac{2}{2}x = 5\\\\\therefore x = 5$