(1)4x+1.6=4,
4x+1.6-1.6=4-1.6,
4x=2.4,
4x÷4=2.4÷4,
x=0.6;
(2)x-32% x=1.7,
0.68x=1.7,
0.68x÷0.68=1.7÷0.68,
x=2.5;
(3)10:x=[2/9]:[4/5],
[2/9]x=10×[4/5],
[2/9]x=8,
[2/9]x÷[2/9]=8÷[2/9],
x=36.
(1)4x+1.6=4,
4x+1.6-1.6=4-1.6,
4x=2.4,
4x÷4=2.4÷4,
x=0.6;
(2)x-32% x=1.7,
0.68x=1.7,
0.68x÷0.68=1.7÷0.68,
x=2.5;
(3)10:x=[2/9]:[4/5],
[2/9]x=10×[4/5],
[2/9]x=8,
[2/9]x÷[2/9]=8÷[2/9],
x=36.