Answer
a and b are not solutions.
Work Step by Step
Check each ordered pair by replacing x and y in the system of equations.
a. 5(-6) - 6(-8) = 18
-30 + 48 = 18
18 = 18; True
2(-8) - (-6) = -4
-16 + 6 = -4
-10 = -4; False
b. 5(3) - 6($\frac{5}{2}$) = 18
15 - 15 = 18
0 = 18; False
2($\frac{5}{2}$) - 3 = -4
2 = -4; False
Neither a or b satisfy both equations.