SOLUTION: Solve the following system by the addition method. 3x-7y= -12 3x+14y= -3 x= Y=

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Question 357906: Solve the following system by the addition method.
3x-7y= -12
3x+14y= -3
x=
Y=
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi,

Solve the following system by the addition method

3x-7y= -12

3x+14y= -3 

Multiplying the first equation thru by 2 and adding the equations together

6x-14y= -24

3x+14y= -3 

9x = -27

x = -3

substituting x into 3x+14y= -3 

-9 + 14y = -3

14y = 6

y = 6/14 or 3/7

checking our answer with 3x-7y = -12

-9 - 3 = -12