помогите пожалуйста дам 80б

1) (х+3,2)*4=15,2

2) 9,84:(х-1,7)=8

3)3,4-90х=1,6

4)5,06+12х=29,72

5) 12у+14у+4,2=12

6)7у+19у-4,2-27,5=50,74
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