Points A, B and C are collinear. Point B is between A and C. Find x if AC=20, BC=x-19 and AB=x+17.
1 answer:
Answer:
11
Step-by-step explanation:
20-[(x-19)+(x+17)]
=20-2x+2
=22-2x
As AB+BC=AC, 22-2x=0.
Thus 2x=22
x=11
it should be right
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