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Brownskin:
Consider the system of linear equations. 2y = x + 10 3y = 3x + 15
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Shadow:
Isolate/solve for a variable in the first equation, then input what you get into the 2nd equation to solve for the other variable. Then once you've solved for that variable, input x = ? or y = ? back into the first equation to get the real solution of the first variable you started with.
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