Решите уравнение (1 2/7y-1/2):2,5=5,2

Question

Решите уравнение

(1 2/7y-1/2):2,5=5,2

Comments

(1 2/7у-1/2)=5,2×2,5=13

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1 2/7у-1/2=13

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1 2/7у=13+1/2=13 1/2

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1 2/7у =13 1/2

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у=13 1/2÷1 2/7=27/2÷9/7=21/2=10 1/2

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у=10 1/2 или у=10,5

Answer 1

(1 2/7у-1/2)=5,2×2,5=13
1 2/7у-1/2=13
1 2/7у=13+1/2=13 1/2
1 2/7у=13 1/2
у=13 1/2÷1 2/7=27/2÷9/7=21/2=10 1/2
у=10 1/2
у=10,5