Mathematics, 29.07.2019 14:00 autumnplunkett09
Me my last day to turn this in! marking brainliest solving systems of equations by elimination 3) 7x + 3y= 22 4y= 20 4) -2x + y= 10 4x - y= -14
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in the second one and substitute its value into the first equation to calculate 
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Me my last day to turn this in! marking brainliest solving systems of equations by elimination 3)...
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