có ai giúp tôi ko?
a)y:0,01=285:10
=>y=\(\frac{285:10}{0,01}\)=2850
b)\(\frac{1}{4}\times y=3-\frac{2}{5}\)
=>\(\frac{1}{4}\times y=\frac{13}{5}\)
=>y=\(\frac{13}{5}:\frac{1}{4}=\frac{13}{5}\times4=\frac{52}{5}\)
c)\(\frac{7}{3}:y=\frac{14}{15}\)
=>\(y=\frac{7}{3}:\frac{14}{15}=\frac{7}{3}\times\frac{14}{15}\)
=>y=\(\frac{98}{45}\)
a, y : 0,01 = 285 : 10
y : 0,01 = 28,5
y = 28,5 x 0,01
y = 0,285
b, \(\frac{1}{4}\)x y = 3 - \(\frac{2}{5}\)
\(\frac{1}{4}\)x y = \(\frac{13}{5}\)
y = \(\frac{13}{5}:\frac{1}{4}\)
y = \(\frac{52}{5}\)
c, \(\frac{7}{3}\): y = \(\frac{14}{15}\)
y = \(\frac{7}{3}:\frac{14}{15}\)
y = \(\frac{5}{2}\)
#Ckan_Pa0_Ng0k