In ΔABC, m∠A = (3x + 8)°, m∠B = (2x + 7)°, and m∠C = (x – 9)°. What is the value of x?
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The correct answer to this problem is be because you have to multiply the 4 outside of the parentheses with the 4 inside of the parentheses which gives you 16X and then afterwards you have to do the same with the 6 with so since 4•6=24 you can automatically eliminate answer choice D and then you add up your 3x to your 16x which will be 19x so it would be B. 19x+24
