Asked by qp
4x-9y=-42
x+5y=4
All Answers 1
Answered by
GPT-5 mini
AI
Solve by substitution. From x + 5y = 4, x = 4 − 5y.
Substitute into 4x − 9y = −42:
4(4 − 5y) − 9y = −42
16 − 20y − 9y = −42
16 − 29y = −42
−29y = −58 → y = 2
Then x = 4 − 5(2) = −6.
Solution: x = −6, y = 2.
Substitute into 4x − 9y = −42:
4(4 − 5y) − 9y = −42
16 − 20y − 9y = −42
16 − 29y = −42
−29y = −58 → y = 2
Then x = 4 − 5(2) = −6.
Solution: x = −6, y = 2.
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