tolong nomer 5 jawab dengan RUMUS plas3!!!mau dikumpulin BESOK!!!

sudut A = 180° - sudut B
3x+10 = 180 - (4x-5)
3x+10 = 180-4x+5
3x+4x = 185-10
7x = 175
x = 175 : 7
x = 25°
maka,
sudut A
= 3x+10
= 3.25 + 10
= 75+10
= 85°

sudut B
= 4x-5
= 4.25 - 5
= 100-5
= 95°