Posted by Paula on Sunday, October 14, 2012 at 10:59pm.
7y +21 x - 15 = 4y- 12 + 13
I assume that once again, you are solving for y ?
7y - 4y = -12 + 13 + 15 - 21x
3y = 16 - 21x
divide each term by 3
y = 16/3 - 7x
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