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\(\frac{9}{4}-y.\frac{5}{6}=\frac{1}{2}+\frac{1}{3}\)
\(\frac{9}{4}-y.\frac{5}{6}=\frac{5}{6}\)
\(y.\frac{5}{6}=\frac{9}{4}-\frac{5}{6}\)
\(y.\frac{5}{6}=\frac{17}{12}\)
\(y=\frac{17}{12}:\frac{5}{6}\)
\(y=\frac{17}{10}\)
\(\frac{9}{4}\)- y x \(\frac{5}{6}\)= \(\frac{1}{2}\)+ \(\frac{2}{3}\) = \(\frac{9}{4}\)- \(\frac{1}{2}\)- \(\frac{2}{3}\)= y x \(\frac{5}{6}\)
y x \(\frac{5}{6}\)= \(\frac{13}{12}\)
y = \(\frac{13}{12}\)x \(\frac{6}{5}\)= \(\frac{13}{10}\)
y.5 + y : 1/2 + y : 1/3
= y.5 + y.2 + y.3
= y.(5 + 2 + 3)
= y.10
\(\left(y-5\right)-\left(y-5\right)+y\cdot5-y:5=5\)
=>\(5y-0,2y=5\)
=>4,8y=5
=>\(y=\dfrac{25}{24}\)
\(y\text{×}5+y:0,25=81\)
\(y\text{×}5+y\text{×}4=81\)
\(y\text{×}\left(5+4\right)=81\)
\(y\text{×}9=81\)
\(y=81:9\)
\(y=9\)
\(y\text{×}3+y:0,2=64\)
\(y\text{×}3+y\text{×}5=64\)
\(y\text{×}\left(3+5\right)=64\)
\(y\text{×}8=64\)
\(y=64:8\)
\(y=8\)
Y x 1 + Y x 2 + Y x 3 + ... + Y x 100 = 12625
Y x (1+2+3+...+100) = 12625
Y x (100+1) x (100:2) = 12625
Y x (101 x 50) = 12625
Y x 5050 = 12625
Y= 12625 : 5050
Y= 2,5