(1)16x-40=9x+16
7x=56
x=8
(2) 4x=20/3x+16
8/3x=-16
x=-6
(3)2(3-x)=-4(x+5)
6-2x=-4x-20
2x=-26
x=-13
(4)3(-2x-5)+2x=9
-6x-15+2x=9
4x=-24
x=-6