Posted by mikey123 on Friday, November 7, 2008 at 11:11pm.
solve by the substitution method
3x + 6y = 27
2x + y = 12
what is the solution of the system..(type an ordered pair, or N if there is no solution)

math  LaTarial, Friday, November 7, 2008 at 11:25pm
3x+6y=27
y=2x+12
Then 3x+6(2x+12)=27
3x+12x+72=27
15x=45
x=9

math  bobpursley, Saturday, November 8, 2008 at 5:28am
Geepers, if x is 3, calculate y from either equation and put it in that form (3,?)
Note that La Tarial made a typo, x=3, not 9

math  bobpursley, Saturday, November 8, 2008 at 5:36am
Actually, it is wrong, La Trial made another error.
3x+12x+72=27
15x=45
x=15
so y = 2(15)+12
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