12х-1,7х-1,8х-31,5при х=10

Question

12х-1,7х-1,8х-31,5при х=10

Answer 1

12х-1,7х-1,8х-31,5=12х-3,5х-31,5=8,5х-31,5
При х=10
8,5*10-31,5=85-31,5=53,5

Answer 2

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