(1)10-5x=2,
10-5x+5x=2+5x,
10=2+5x,
10-2=2+5x-2,
8=5x,
8÷5=5x÷5,
x=1.6;
(2)
:0.8=x:0.48,5 12
0.8x=0.48×
,5 12
0.8x÷0.8=0.2÷0.8,
x=0.25.
(1)10-5x=2,
10-5x+5x=2+5x,
10=2+5x,
10-2=2+5x-2,
8=5x,
8÷5=5x÷5,
x=1.6;
(2)
5
12
:0.8=x:0.48
,
0.8x=0.48×
5
12
,
0.8x÷0.8=0.2÷0.8,
x=0.25.