Question 9 • Mathematics 8
Substitute x = 4 and y = −5 into both equations in each system. In choice D, 3(4) − 2(−5) = 12 + 10 = 22, and 2(4) + 9(−5) = 8 − 45 = −37. Both equations are true, so choice D, the system with those equations, has the ordered pair as a solution.
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