SOLUTION: 7x+7y=28 -7x+y=57 Solve by the substitution method

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Question 227722: 7x+7y=28
-7x+y=57
Solve by the substitution method
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
7x+7y=28
-7x+y=57

Solve by the substitution method

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++7%5Cx+%2B+7%5Cy+=+28%2C%0D%0A++++-7%5Cx+%2B+1%5Cy+=+57+%29%0D%0A++We'll use substitution. After moving 7*y to the right, we get:
7%2Ax+=+28+-+7%2Ay, or x+=+28%2F7+-+7%2Ay%2F7. Substitute that
into another equation:
-7%2A%2828%2F7+-+7%2Ay%2F7%29+%2B+1%5Cy+=+57 and simplify: So, we know that y=10.625. Since x+=+28%2F7+-+7%2Ay%2F7, x=-6.625.

Answer: system%28+x=-6.625%2C+y=10.625+%29.



I hope the above steps were helpful.

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Dr J
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