please jawab dengan caranya

5. a) 2x+ (x+35) + (x-5) =180
6x + 30 = 180
6x = 180 - 30
6x = 150
x = 30
b) 2x
=2*30
x+35
=30+35 = 65
3x - 5
=3*30-5 = 85

6. a) 6x+5x+70=180
11x = 180-70
11x = 110
x=10
6x
=6*10=60
5x
=5*10=50

b) 5x+2x+3x=180
10x=180
x=18
5x
=5*18=90
2x
=2*18=36
3x
=3*18=54