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OpenStudy (mm3591):
Combine 12x+6y+120 and 4x+y=30 to eliminate one of the variables and then solve for the other
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OpenStudy (mm3591):
16x+7y=150
OpenStudy (mm3591):
how?
OpenStudy (anonymous):
Hint: Multiply both sides of 4x+y=30 by -3 and then add the equations together.
OpenStudy (anonymous):
12x+6y=120 -12x-3y=-90
OpenStudy (anonymous):
Looks like a typo error. 12x+6y+120 should be 12x+6y=120
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