Consider the system of equations

\(\begin{align*} 5x + y &= 31, \\ -3x + 4y &= -37. \end{align*}\)

solve the first equation for y in terms of x

enter your answer in the form of "y= ..."

Isolate y:

y = -5x + 31

If you want to solve the entire system of equations, multiple E1 by 3, and E2 by 5

15x + 3y = 93

-15x + 20y = -185

Adding both equations I obtain:

23y = -92

y = -4

x = 7

(x, y) = (7, -4)