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OpenStudy (anonymous):
Use substitution to solve the system x − 4y = −12 3x − 3y = 0
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OpenStudy (campbell_st):
rewrite the 1st equation x = -12 + 4y substitute it into the 2nd equation 3(-12 + 4y) - 3y = 0 now solve for y when you have y substitute it into either equation to find x.
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