Posted by lauren on Monday, September 15, 2008 at 9:24pm.
Distribute the 7: 7n+7-4n=4
Combine like terms (n): 3n+7=4
Subtract the 7 on both sides: 3n=-3
Divide by 3: n=-1
Distribute the 5: 8=3+5y-10
Add the 7 to the other side: 15=5y
Divide by 5: y=3
Distribute both terms: 2x-6+3x-3=-5
Subtract and add: 5x-9=-5
Add 9: 5x=4
Divide by 5: x=4/5
7n + 7 - 4n = 4
3n = -3
n = -1
-7x + 21 = -14
-7x = -35
8 = 3 + 5y - 10
2x -6 + 3x - 3 = -5
5x = 4
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