Question

resolva x menos y = 10 2x mais 3y = 10 por favorzinho​

Answer 1

$\Large\boxed{\begin{array}{l}\begin{cases}\sf x-y=10\cdot3\\\sf 2x+3y=10\end{cases}\\\\+\underline{\begin{cases}\sf3x-3y=30\\\sf 2x+3y=10\end{cases}}\\\sf 5x=40\\\sf x=\dfrac{40}{5}\\\\\sf x=8\\\sf x-y=10\\\sf 8-y=10\\\sf y=8-10\\\sf y=-2\\\sf S=\{8,-2\}\end{array}}$

Answer 2

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\begin{cases}\mathsf{x - y = 10}\\\mathsf{2x + 3y = 10}\end{cases}$

$\mathsf{x = 10 + y}$

$\mathsf{2(10 + y) + 3y = 10}$

$\mathsf{20 + 2y + 3y = 10}$

$\mathsf{5y = -10}$

$\boxed{\boxed{\mathsf{y = -2}}}$

$\mathsf{x = 10 - 2}$

$\boxed{\boxed{\mathsf{x = 8}}}$