Найдите х, С РЕШЕНИЕМ
1. (х+98)+14=169
2. 9х+15)-8=17
3. 56-(х+12)=24
4. (45-у)+18=58
5. 9у-3у=666
6. 6у+3,7=38,5
7. (2,8+х) : 9=08
8. 1,7х+21+3,1х=57
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