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OpenStudy (anonymous):
solve system by substution x=y x+2y=3
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OpenStudy (anonymous):
If x=y, you can substitute x for y, or y for x to solve
OpenStudy (anonymous):
ok thanks alot
OpenStudy (anonymous):
If x=y, then x+2y=3 is the same as y+2y=3... therefore: 3y=3
OpenStudy (anonymous):
likewise: x+2y=3 is the same as x+2x=3, so: 3x=3
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