Question

What is the length of AC¯¯¯¯¯ ?





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Answer 1

In the question, the angles proves that this triangle is an isoceles triangle.

So we can set the two sides equal:
`x + 4 = 3x - 8`

Add
`-x+8` to both sides of the equation:
`12 = 2x`

Divide both sides by 2:
`x = 6`

We find that
`x=6`. AC is also x, so, it is 6 too.