tolong dijawab no. 16,31,33!!please pake cara!

16.x-9=10
=x=10+9
=x=19

31.3(2x+7)=5(x-4)
=6x+21=5x-20
=21+20=5x-6x
=41=-x
=x=-41

16.
x - 9 = 10
x = 10 + 9
x = 19

31.
3(2x + 7) = 5(x - 4)
6x + 21 = 5x - 20
6x - 5x = -20 - 21
x = -41

33.
8(3/4y + 3/4) = 5(y + 4/5)
6y + 6 = 5y + 4
6y - 5y = 4 - 6
y = -2