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OpenStudy (anonymous):
I know how to do elimination but I forgot what to do when one equation doesn't have a number next to the y. Elimination Using Addition and Subtraction. When the signs are opposite you add. When they're the same you subtract. 6x + y = 9 -6x + 3y = 15
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OpenStudy (phi):
do you know how to add the 2 equations?
OpenStudy (phi):
6x + -6x + 1y + 3y = 9+15
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