SOLUTION: The rectangular coordinate system, graphing linear equations and slope. Verify that the ordered pair (2,-3)is a solution to the equation 4x + 5y = -7 thanks for all the help! ;)

Algebra ->  Linear-equations -> SOLUTION: The rectangular coordinate system, graphing linear equations and slope. Verify that the ordered pair (2,-3)is a solution to the equation 4x + 5y = -7 thanks for all the help! ;)       Log On


   

Question 201456: The rectangular coordinate system, graphing linear equations and slope.
Verify that the ordered pair (2,-3)is a solution to the equation 4x + 5y = -7
thanks for all the help! ;)
1 solutions
Answer 151658 by jim_thompson5910(12456) About Me on 2009-06-28 16:21:25:
You can put this solution on YOUR website!
Simply plug in x=2 and y = -3 into 4x+5y=-7 and simplify. If the two sides of the equation are equal, then the ordered pair (2, -3) is a solution.
I still am not understanding how the problem is done. I'm really lost!
x=2+5=7 not -7 and y=-3+4=1 so how does that makes the equation equal? or do you make it x=-2 + -5=-7 and y=-3 + -4=-7?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
4x+%2B+5y+=+-7 Start with the given equation.


4%282%29+%2B+5%28-3%29+=+-7 Plug in x=2 and y=-3


8+-15+=+-7 Multiply


-7+=+-7 Subtract


Since the equation is true, this means that (2, -3) is an ordered pair solution.