Question

Write a formal 2-column proof for the following question:

Answer 1

Answer- 4

Detailed explanation:

AB= 3x+15
AC= 5x+7

If AB = AC
then,
=> 3x+15 = 5x+7
=> 5x-3x = 15-7
=> 2x = 8
=> x = 8/2
=> x=4

Answer 2

The equation on the left would be 27 and the one on the right would be 27 as well, which shows that AB and AC are equal. I'm afraid, though, that I'm not quite sure what sort of answer you want as I'm not currently learning this. Sorry if this isn't helpful. I'm afraid I only answered the obvious.