Question

Descubra os valores de y e x:

3x - 4y = 7
4x + 3y = 26​

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\begin{cases}\mathsf{3x - 4y = 7\:\: \rightarrow (-4)}\\\mathsf{4x + 3y = 26\rightarrow (+3)}\end{cases}$

$\begin{cases}\mathsf{-12x + 16y = -28}\\\mathsf{12x + 9y = 78}\end{cases}$

$\mathsf{25y = 50}$

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

$\mathsf{3x - 4(2) = 7}$

$\mathsf{3x - 8 = 7}$

$\mathsf{3x = 15}$

$\boxed{\boxed{\mathsf{x = 5}}}$