Posted by anon on Saturday, January 22, 2011 at 8:37am.
2 + 7/y = 3/5
7/y = 3/5 - 2
y/7 = 1/(3/5 - 2)
2 + 7/y = 3/5
Get rid of the denominators
Multiply both sides by y
2y + 7 = 3/5 y
Multiply both sides by 5
10y + 35 = 3y
Subtract 10y from both sides
35 = -7y
Divide both sides by -7
-5 = y
y = -5
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