What is the length of — AB

Answer:
AB = 12
Step-by-step explanation:
4x=2x+6
Subtract 2x to get 2x=6
Divid by two to get x=3
Plug three in for x, both equations equal 12.
AB is 12
Answer:
B. 3
Step-by-step explanation:
So this is an isosceles triangle. You know this because it has 2 congruent angles. This also means the 2 sides are congruent AB=BC.
4x=2x+6
subtract 2x from both sides
2x=6
divide both sides by 2
x=3
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