Consider the system of equations

5x - y = 31

-3x + 4y = -37

Substitute this into the second equation: y = 5x - 31

Solve for x and y, enter your answer as an ordered pair(x,y)

Im not sure what subsituting it into the third equation, but the answer to the first system of equation is

(87/17, -92/17). Hopes this helps