x |
8 |
0.24 |
0.6 |
0.6x=8×0.24,
0.6x÷0.6=1.92÷0.6,
x=3.2;
(2)1.24×4-7x=
3 |
5 |
4.96-7x=
3 |
5 |
4.96-7x+7x=
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
7x÷7=4.36÷7,
x=
109 |
175 |
(3)x-30%x=50%x+12,
x-30%x-50%x=50%x+12-50%,
0.2x=12,
0.2x÷0.2=12÷0.2,
x=60.
x |
8 |
0.24 |
0.6 |
3 |
5 |
x |
8 |
0.24 |
0.6 |
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
3 |
5 |
109 |
175 |