tolong donk soal mtk pake caranya mksh

d.120
maaf kalo salah

1. x + 2x + 3x = 180 <=> 6x = 180 <=> x = 30
    3x adalah yang terbesar, 3x = 3 x 30 = 90
2. A + B = 90 <=> (3x-8) + (x-6) = 90 <=> 4x + (-14) = 90 <=> 4x = 104 <=> x = 26
3. pelurus A = 180 - A <=> A = 3/5 (180-A) <=> 5A = (3 x 180) - 3A <=> 8A = 540 <=> A = 67,5