Помогите с 3) 4) 1060

Question

Помогите с 3) 4) 1060

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Answer 1

3) (5+3:10)x-(2+7:100)x-2:25x=(5+3:10-(2+7:100)-2:25)x=3,15x
4)5y-(4+3:8)y+4:5y=(5-(4+3:8)+4:5)y=
=(1+17:40)y=1,425y