1 |
3 |
1 |
2 |
x |
0.01 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
300 |
1 |
2 |
x=
1 |
150 |
(2)x:2.5=1.2:2.4
2.4x=2.5×1.2
2.4x÷2.4=3÷2.4
x=1.25;
(3)x-15%x=68
85%x=68
85%x÷85%=68÷85%
x=80;
(4)(12+x)×9=162
(12+x)×9÷9=162÷9
12+x-12=18-12
x=6.
1 |
3 |
1 |
2 |
x |
0.01 |
1 |
3 |
1 |
2 |
x |
0.01 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
300 |
1 |
2 |
1 |
150 |