Question

y:0,25+y:0,125+y:0,5=1,0

tìm y

Answer 1

y : 0,25 + y : 0,125 + y: 0,5 = 1

=> y : 1/4 + y : 1/8 + y : 1/2 = 1 

=> y . 4 + y . 8 + y . 2 = 1 

=> y.(4 + 8 + 2) = 1 

=> y . 14 = 1 

=> y = 1/14 

Vậy ...

Answer 2

\(y\div0,25+y\div0,125+y\div0,5=1,0\)

\(y\div\left(0,25+0,125+0,5\right)=1,0\)

\(y\div0,875=1,0\)

\(y=1,0\times0,875\)

\(y=0,875\)

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Answer 3

\(y:0,25+y:0,125+y:0,5=1\)

\(\Rightarrow y:\frac{25}{100}+y:\frac{125}{1000}+y:\frac{50}{100}=1\)

\(\Rightarrow y:\frac{1}{4}+y:\frac{1}{8}+y:\frac{1}{2}=1\)

\(\Rightarrow y.4+y.8+y.2=1\)

\(\Rightarrow y.\left(4+8+2\right)=1\)

\(\Rightarrow y.14=1\)

\(\Rightarrow y=\frac{1}{14}\)

Vậy   \(y=\frac{1}{14}\)

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