SOLUTION: AB =x, AC = 3x -12, and BC = 12 find AB

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Question 986060: AB =x, AC = 3x -12, and BC = 12 find AB
Answer by srinivas.g(540) About Me  (Show Source):
You can put this solution on YOUR website!
AB+BC=AC
x+12=3x-12
move -12 to the left
x+12+12 =3x
x+24= 3x
move x to the right
24 = 3x-x
24 = 2x
24/2=x
12=x
hence X=12
AB= x= 12