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

Question 986060: AB =x, AC = 3x -12, and BC = 12 find AB
Answer by srinivas.g(540) (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
RELATED QUESTIONS
B is the midpoint of line AC. Find the value of x and the length of line AB. AB=... (answered by opeodu)

triangle abc is isosceles with ab=ac, ab=4x-2, bc=4x-3, ac=2x+12 find... (answered by stanbon)

Triangle ABC is isosceles with AB=AC, AB=4x-2, BC=4x-3, AC=2x+12 find... (answered by Edwin McCravy,stanbon)

in circle O, AB=12 AC=13 and (answered by Alan3354)
If BC = 15, AC = 18, and AB = 12, find the perimeter of triangle DEF. (answered by mananth,josgarithmetic,ikleyn)
If AB=2(x+1),BC=3x+1, and AC=4(x+2), then find the value for x,AB,BC, and... (answered by stanbon)
Suppose B is the midpoint of AC. AB = 5x and BC = 3x + 4. Find AB. (answered by MathLover1)
if AB=2x-16, BC=3x-19, and AC=30, how do you find the value of x, AB, and... (answered by ewatrrr)
In triangle ABC, AB = 9, BC = 12, AC = 15, and CD is the angle bisector. Find the length... (answered by ikleyn,addingup)