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OpenStudy (anonymous):
How do u find the answer to this 9x + 6y = 78 and 3x - 6y = 30
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OpenStudy (anonymous):
Are they separate?
OpenStudy (anonymous):
Move all the terms containing x to the left, and all others to the right. Add -6y to each side of the equation.\[9x + 6y + -6y = 78 + -6y\]
OpenStudy (anonymous):
Combine like terms: \[6y + -6y = 0\] \[9x + 0 = 78 + -6y \] \[9x = 78 + -6y \]
OpenStudy (anonymous):
Now with that you figure out the rest
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