①4x+2x=4.8,
6x=4.8,
6x÷6=4.8÷6,
x=0.8;
②102-2x=70,
102-70+2x-2x=70-70+2x,
52=2x,
2x÷2=52÷2,
x=26;
③x÷0.6=4.5,
x×
5
3 ×
3
5 =4.5×
3
5 ,
x=2.7.
①4x+2x=4.8,
6x=4.8,
6x÷6=4.8÷6,
x=0.8;
②102-2x=70,
102-70+2x-2x=70-70+2x,
52=2x,
2x÷2=52÷2,
x=26;
③x÷0.6=4.5,
x×
5
3 ×
3
5 =4.5×
3
5 ,
x=2.7.