500
2x + 3y = -15 and 5x + 2y = 1 (by Elimination)
What is x = 3 and y = -7
Equation #1 multiplied by 2 and #2 is multiplied by -3
4x + 6y = -30
-15x - 6y = -3
Add equations to get
-11x = -33 -- divide by -11 on each side
x = 3 --- this is substituted into one of the original equations
5(3) + 2y = 1
15 + 2y = 1 move 15 to other side of = sign
2y = -14 divide each by 2
y = -7