(1)x+16x=136
17x=136
17x÷17=136÷17
x=8;
(2)58:x=34:6
34x=58×6
34x÷34=348÷34
x=
;174 17
(3)100-14x=30
100-14x+14x=30+14x
100=30+14x
100-30=30-14x-30
70=14x
70÷14=14x÷14
x=5;
(4)x:20=1:6
6x=20×1
6x÷6=20÷6
x=
;10 3
(5)9x-1.8=5.4
9x-1.8+1.8=5.4+1.8
9x=7.2
9x÷9=7.2÷9
x=0.8;
(6)24:1.2=x:
3 4
1.2x=24×
3 4
1.2x÷1.2=18÷1.2
x=15.