Question

7x+9y=-41 and x+3y=1. Solve system of equations

Answer 1

9514 1404 393

Answer:

(x, y) = (-11, 4)

Explanation:

You can subtract 3 times the second equation from the first to eliminate y.

(7x +9y) -3(x +3y) = (-41) -3(1)

4x = -44

x = -11

Substituting into the second equation gives ...

-11 +3y = 1

3y = 12

y = 4

The solution is (x, y) = (-11, 4).