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Use the elimination method by subtraction to solve for x and then y. Equation 1 > 2x – 7y = -74 Equation 2 > 3x – 7y = -83
Question
Use the elimination method by subtraction to solve for x and then y.
Equation 1 > 2x – 7y = -74
Equation 2 > 3x – 7y = -83
Solve for x and y.
Please and thank you!
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Mathematics
3 years
2021-09-03T17:46:57+00:00
2021-09-03T17:46:57+00:00 1 Answers
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Answer:
Step-by-step explanation:
Both equations have -7y. You can eliminate them by subtracting one equation from the other:
Multiply equation 1 by -1, then add it to equation 2:
-2x + 7y = 74
3x – 7y = -83
———————
x = -9
2x – 7y = -74
2(-9) – 7y = -74
-7y = -56
Y = 8
(x,y) = (-9, 8)