SOLUTION: Do I arrange this problem x+y=12 I do not know if I put 2x under the x Please show me! y=2x

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Question 60824: Do I arrange this problem x+y=12 I do not know if I put 2x under the x Please show me! y=2x
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
IF YOU ARE SOLVING FOR Y THENYOU SUBSTITUTE 2X FOR Y THUS
X+2X=12
3X=12
X=12/3
X=4 SOLUTION
NOWSOLVE FOR Y BY SUBSTITUTING 4 FOR X THUS
4+Y=12
Y=12-4
Y=8 SOLUTION
PROOF
X+Y=12
4+8=12
12=12