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Krystan
Mathematics
9 August, 09:52
4x+9y=9/:and/:2x-9y=-63
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Alan Le
9 August, 10:04
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Solve through linear combination
4x+9y=9
+ 2x-9y=-63
6x = - 54
So, you get the equation 6x=54, and by diving by 6 on each side of the equation you find that x=9
Plug this into one of the original equations to find y.
4 (9) + 9y=9
36+9y=9
9y=-27
y=-3
Now we know that x=9 and y=-3, so the solution to this system of equations is (9,-3)
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