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OpenStudy (anonymous):
Solve the system by substitution. -4.5x-2y=-12.5 3.25x-y=-0.75 Please help my step by step so I can really understand, I'm super confused!
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hero (hero):
Isolate y in the second equation to get y = 3.25x + 0.75
hero (hero):
Then substitute the expression for y in place of y in the first equation: I'd also multiply the first equation by 10 to make things easier: -45x -20y = -125 -45x - 20(3.25x + 0.75) = -125
hero (hero):
I know you may be uncomfortable with decimals, but there is not always a way to avoid them completely.
hero (hero):
This is one of those cases.
OpenStudy (anonymous):
so multiply like this? (10)-45x- (10)-20y= (10)-125
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OpenStudy (anonymous):
@Hero
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