Question

Por favor me ajudem nessa pergunta:

5y-7=20+2y.

E nessa:

5x-12=4×+8.
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Answer 1

1° Pergunta:

$\huge \boxed{\sf y = 9}$

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$\sf 5y - 7 = 20 + 2y \\ \\ \sf 5y - 2y = 20 + 7 \\ \\ \sf 3y = 27 \\ \\ \sf y = \frac{27}{3} \\ \\ \sf {\color{Blue}y = 9}$

2° Pergunta:

$\huge \boxed{\sf x = 20}$

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$\sf 5x - 12 = 4x + 8 \\ \\ \sf 5x - 4x = 8 + 12 \\ \\ \sf{\color{Blue} x = 20}$

Att: Nerd1990