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OpenStudy (anonymous):
3x+y=12 and 4-y=9 solve xy
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OpenStudy (cwrw238):
add the 2 equations to eliminate y solve for x then plug this value of x into one of the original equations and solve for y.
OpenStudy (cwrw238):
are you sure you have the 2nd equation right? its not 4x - y = 9?
OpenStudy (cwrw238):
if its is correct then you can find y from this equation and plug the result straight into equation 1 to find x.
OpenStudy (anonymous):
I have same thought. answer will be easy then. but anyway method to solve is same in either case.
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