SOLUTION: 4X-4Y=4 -2X+Y=2

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Question 26417: 4X-4Y=4
-2X+Y=2
Answer by Alwayscheerful(414) About Me  (Show Source):
You can put this solution on YOUR website!
Solved by pluggable solver: Linear System solver (using determinant)
Solve:
+system%28+%0D%0A++++4%5Cx+%2B+-4%5Cy+=+4%2C%0D%0A++++-2%5Cx+%2B+1%5Cy+=+2+%29%0D%0A++

Any system of equations:


has solution

or



(x=-3, y=-4}

OR
Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++4%5Cx+%2B+-4%5Ca+=+4%2C%0D%0A++++-2%5Cx+%2B+1%5Ca+=+2+%29%0D%0A++We'll use substitution. After moving -4*a to the right, we get:
4%2Ax+=+4+-+-4%2Aa, or x+=+4%2F4+-+-4%2Aa%2F4. Substitute that
into another equation:
-2%2A%284%2F4+-+-4%2Aa%2F4%29+%2B+1%5Ca+=+2 and simplify: So, we know that a=-4. Since x+=+4%2F4+-+-4%2Aa%2F4, x=-3.

Answer: system%28+x=-3%2C+a=-4+%29.

Hope this helps!