Question

3x+4y=-16 and 5x+5y=-5

Answer 1

Answer:

$y=-13,\:x=12$

Step-by-step explanation:

$\begin{bmatrix}3x+4y=-16\\ 5x+5y=-5\end{bmatrix}\\\\\begin{bmatrix}5\cdot \frac{-16-4y}{3}+5y=-5\end{bmatrix}$

$-\frac{80}{3}-\frac{5y}{3}=-5\\y=-13\\\\x=\frac{-16-4\left(-13\right)}{3}\\x=12$