bantuin dong plase pake cara

[tex]180 - 95 = 85 \\ 3x - 5 + x + 10 = 85 \\ 4x + 5 = 85 \\ 4x = 85 - 5 \\ x = 80 \div 4 \\ x = 20 \\ \\ \\ sudut bac = 3 \times 20 - 5 = 55[/tex]
BAC = 3×20-5=55 DERAJAT
c