Tìm y:
y + y : 2 + y : 4 + y : 8 = 37,725
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2/ Tìm y:
y + \(\dfrac{1}{3}\) x 4 = 12 \(\dfrac{2}{5}\) + y = \(\dfrac{12}{35}\) x \(\dfrac{14}{9}\)
\(y=12-\left(\dfrac{1}{3}\times4\right)=12-\dfrac{4}{3}=\dfrac{32}{3}\)
\(y=\left(\dfrac{12}{35}\times\dfrac{14}{9}\right)-\dfrac{2}{5}=\dfrac{8}{15}-\dfrac{2}{5}=\dfrac{2}{15}\)
\(y-36=y\div y+1\)
\(y-36=1+1\)
\(y-36=2\)
\(y=2+36\)
\(y=38\)
Vậy \(y=38\)
\(y-36=y:y+1\)
\(y-36=1+1\)
\(y-36=2\)
\(y=2+36\)
\(y=38\)
\(y.\left(20+16\right)=972\Leftrightarrow36y=972\Leftrightarrow y=27\)
\(\Rightarrow y\times\left(3,2+6,8\right)=26,68\\ \Rightarrow y\times10=26,68\\ \Rightarrow y=26,68:10\\ \Rightarrow y=2,668\)
219,1 + y:y < y \(\times\) 2 + y \(\times\) 4 - y < 230,2 - y + y
219,1 + 1 < y \(\times\) 2 + y \(\times\) 4 - y \(\times\) 1 < 230,2 - ( y - y)
210,1 < y \(\times\) ( 2 + 4 - 1) < 230,2
210,1 < y \(\times\) 5 < 230,2
210,1 : 5 < y < 230,2: 5
42,02 < y < 46,04
y + y * 1/2 + y * 1/4 + y * 1/8 = 37,725
y * ( 1+1/2+1/4+1/8 ) = 37,725
y * 15/8 = 37,725
y= 37.725 : 15/8
y= 20,12