tolong di jawab pakai cara

(C)
cara
(3x + 4) + (5x + 7) + (2x - 6) = 180
3x + 5x + 2x = 180 - 4 - 7 + 6
10x = 175
x = 17,5

(3x + 4) = 3(17,5) + 4 = 56,5

180 - 56,5 = 123,5