SOLUTION: is (15,-6) is ordered pair or solution? -3y=x+3 2y=4x-72

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Question 147457: is (15,-6) is ordered pair or solution?
-3y=x+3
2y=4x-72
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

-3y=x%2B3 Start with the given equation.


-3%2A%28-6%29=%2815%29%2B3 Plug in x=15 and y=-6.


18=%2815%29%2B3 Evaluate and simplify the left side.


18=18 Evaluate and simplify the right side.


Since the equation is true, this means that (15,-6) is a solution.


2y=4x-72 Start with the given equation.


2%2A%28-6%29=4%2A%2815%29-72 Plug in x=15 and y=-6.


-12=4%2A%2815%29-72 Evaluate and simplify the left side.


-12=-12 Evaluate and simplify the right side.


Since the equation is true, this means that (15,-6) is a solution.


Since all of the equations of the system are true, this means that (15,-6) is a solution