Question

Tell whether (-5, -6) is a solution of

x - 2y = 7
y - x = -1

Answer 1

(-5, -6) is a solution.

Explanation:

x - 2y = 7

-5 - 2(-6) = 7

-5 - (-12) = 7

-5 + 12 = 7

7 = 7

y - x = -1

-6 - (-5) = -1

-6 + 5 = -1

-1 = -1