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OpenStudy (anonymous):
solve the system of equations using elimination. -7x-2y=-13y x-2y=11
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OpenStudy (tkhunny):
Elimination. Think about common multiples. The most glaring, here, would be the y-coefficients. How about multiplying the first equation by -1?
OpenStudy (anonymous):
why would i multiply it by negative one?
OpenStudy (tkhunny):
You didn't do it? Very disappointing. 1) All those negatives will be eliminated, making the whole problem prettier. 2) The y will then be easily eliminated. Since we are using "elimination", this is good.
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