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Mathematics 21 Online
OpenStudy (anonymous):

How do u find the answer to this 9x + 6y = 78 and 3x - 6y = 30

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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