SOLUTION: I have to solve a system of equations using substitution to eliminate one variable for y=2x and 3x+y=20.
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Question 455914: I have to solve a system of equations using substitution to eliminate one variable for y=2x and 3x+y=20.
Found 2 solutions by solver91311, richwmiller:
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Your first equation guarantees that 
and 
are utterly identical. Replace in the second equation with , then solve for 
John
My calculator said it, I believe it, that settles it
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
plug 2x in for y in the second equation
3x+2x=20
5x=20
x=4
y=2x=8
(4,8)
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