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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