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(1)x-
x=
(1-
)x=
x=
x÷
=
÷
x=
(2)5x-9×2=52
5x-18=52
5x-18+18=52+18
5x=70
5x÷5=70÷5
x=14
1 |
4 |
3 |
8 |
(1-
1 |
4 |
3 |
8 |
3 |
4 |
3 |
8 |
3 |
4 |
3 |
4 |
3 |
8 |
3 |
4 |
x=
1 |
2 |
(2)5x-9×2=52
5x-18=52
5x-18+18=52+18
5x=70
5x÷5=70÷5
x=14
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