SOLUTION: I need help! solve each system of equations by elimination 5x - 4y = 23 7x + 8y = 5 Thanks

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Question 125638: I need help!
solve each system of equations by elimination
5x - 4y = 23
7x + 8y = 5
Thanks
Answer by iluvbuilding429(41) About Me  (Show Source):
You can put this solution on YOUR website!
I need help!
solve each system of equations by elimination
5x - 4y = 23
7x + 8y = 5
Thanks


Multiply the first equation by 2, so that the y's cancel out.
10x-8y=46
7x%2B8y=5


Add the like terms:
17x=51


Divide both sides by 17:
x=3


Plug this value into one of the original equations:
5%283%29-4y=23


Multiply:
15-4y=23


Subtract 15 from both sides:
-4y=8


Divide both sides by -4:
y=-2


So, x=3 and y=-2


-buildings