Решите уравнения:
1. 8х-3х+43=108
2.9у+2у-19=102
3.14х-7х-42=21
4.5у+у+19=139
5.15х-6х-3х=21,6
6.30у-9у-12у=3,42
7.5х+7х-8х=0,48
8.8у-3у+7у=156
Помогите пожалуйста)
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