SOLUTION: My directions are: Solve the linear system. And i am given the two equations: 2c - d = -2 and 4c + d = 20. I dont know what to do! can you please explain it and help? thank

Algebra ->  College  -> Linear Algebra -> SOLUTION: My directions are: Solve the linear system. And i am given the two equations: 2c - d = -2 and 4c + d = 20. I dont know what to do! can you please explain it and help? thank       Log On


   



Question 646934: My directions are: Solve the linear system. And i am given the two equations:
2c - d = -2 and
4c + d = 20.
I dont know what to do! can you please explain it and help? thank youuuu!

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
2c - d = -2
4c + d = 20
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Add the equations to get:
6c = 18
c = 3
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Solve for "d":
2c - d = -2
2*3 -d = -2
6 -d = -2
d = 8
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Cheers,
Stan H.
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