# math

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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 -

3x+6y=27
y=2x+12

Then 3x+6(2x+12)=27
3x+12x+72=27
15x=45
x=9

• math -

i get that part but it tells me im wrong that they want it something like this..(3,4)i don't get that..

• math -

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 -

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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