SOLUTION: x+8y=76 -x+9y=77

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Question 225065: x+8y=76
-x+9y=77
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
x+8y=76
-x+9y=77

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++1%5Cx+%2B+8%5Cy+=+76%2C%0D%0A++++-1%5Cx+%2B+9%5Cy+=+77+%29%0D%0A++We'll use substitution. After moving 8*y to the right, we get:
1%2Ax+=+76+-+8%2Ay, or x+=+76%2F1+-+8%2Ay%2F1. Substitute that
into another equation:
-1%2A%2876%2F1+-+8%2Ay%2F1%29+%2B+9%5Cy+=+77 and simplify: So, we know that y=9. Since x+=+76%2F1+-+8%2Ay%2F1, x=4.

Answer: system%28+x=4%2C+y=9+%29.



I hope the above steps were helpful.

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Dr J

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