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russboys3
04.02.2020 •
Mathematics
Solve using substitution.
y = x + 2
y − x = 8
sec. 8.2 #30
solve using the elimination method.
5x − 3y = 8
-5x + y = 4
i tried solving but the x's in the first problem cancelled each other out and now i'm confused
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Ответ:
The second problem you can just add so that you eliminate 5x, and you get -2y = 12; y = -6; replace back into the equation:
-5x + -6= 4
-5x = 10
X = -2, then check your work
Ответ:
21
Step-by-step explanation: