SOLUTION: Solve this system of linear equations using the elimination method. Be sure to show all your work. 12x + 6y = 30 -2x + 7y = 51

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Solve this system of linear equations using the elimination method. Be sure to show all your work. 12x + 6y = 30 -2x + 7y = 51       Log On


   

Question 1131306: Solve this system of linear equations using the elimination method. Be sure to show all your work.
12x + 6y = 30
-2x + 7y = 51
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
multiply second equation by 2 to make the xs cancel
12x+6y=30
-12x+42y=306
48y=336
y=7
substitute into first equation 12x+42=30
12x=-12
x=-1
check in second
2+49=51
checks
(-1, 7)