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OpenStudy (anonymous):
solve using the substitution method y = 5 - x 2x + 3y = 12
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OpenStudy (johnweldon1993):
Well as you see, that first equation...tells you what 'y' equals... in your second equation...now that you know what 'y' equals...you can substitute that in for every 'y' you see y = 5 - x 2x + 3y = 12 after substitution 2x + 3(5-x) = 12 now solve for 'x'
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