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OpenStudy (anonymous):
how do you solve this equation y=x-7 3x-3y=21
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OpenStudy (p0sitr0n):
same equation? 3x-3y=21 x-y=7 -y=7-x y=x-7
OpenStudy (anonymous):
i dont understand what is the y
OpenStudy (p0sitr0n):
its a variable which depends on x actually, y=x-7 is a line |dw:1362958581430:dw|
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