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Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: Copy and paste the link to view the picture, thank you! https://pacyber-li.brainhoney.com/Resource/21603633,27,0,35/Assets/Test5Q2.JPG      Log On


   

Question 968838: Copy and paste the link to view the picture, thank you!
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Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE linear system by SUBSTITUTION
Solve:
+system%28+%0D%0A++++4%5Cx+%2B+-4%5Cy+=+-16%2C%0D%0A++++1%5Cx+%2B+-2%5Cy+=+-12+%29%0D%0A++We'll use substitution. After moving -4*y to the right, we get:
4%2Ax+=+-16+-+-4%2Ay, or x+=+-16%2F4+-+-4%2Ay%2F4. Substitute that
into another equation:
1%2A%28-16%2F4+-+-4%2Ay%2F4%29+%2B+-2%5Cy+=+-12 and simplify: So, we know that y=8. Since x+=+-16%2F4+-+-4%2Ay%2F4, x=4.

Answer: system%28+x=4%2C+y=8+%29.


answer is: D (4,8)