Question

Please answer soon. (35 Points)

Answer 1

x = 19

ABC = 48°.

Explanation:

(7x - 1) + (3x - 9) = 180.

(7x - 1 + 1) + (3x - 9) = 180 + 1

7x + 3x - 9 = 10x - 9

10x - 9 = 181

10x - 9 + 9 = 181 + 9

10x = 190

10x/10 = 190/10

x = 19

ABC = (3x - 9)

3 x 19 = 57

57 - 9 = 48