Question

Me ajuda nessa questão


3x-2y=30
2x+3y=90

Answer 1

$\LARGE\displaystyle{}\begin{cases}3x - 2y = 30 \\ 2x + 3y = 90\end{cases} \\\\\\ \LARGE\displaystyle{}\begin{cases}x = 10 + \dfrac{2}{3}y \\ \\ 2x + 3y = 90 \end{cases} \\\\\\\LARGE\displaystyle{}2 \left(10 + \dfrac{2}{3}y \right) + 3y = 90 \\\\\\ \LARGE\displaystyle{}y = \dfrac{210}{13} \\\\\\ \LARGE\displaystyle{}x = 10 + \dfrac{2}{3} \times \dfrac{210}{13} \\\\\\ \LARGE\displaystyle{}x = \dfrac{270}{13} \\\\\ \LARGE\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{ \left(x,y\right) =\left( \dfrac{270}{13}, \dfrac{210}{13} \right) }}}\end{gathered} }$

$\LARGE\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{{ \red{Bons}} \blue{\:Estudos}}}}\end{gathered} }$