5/6 + y * 3/4 = 3
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5 và 1/6 – y : 3/4 = 3/5
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( 4,58 + y ) * 2,5 = 55,05
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Câu 1:
$\frac{5}{6}$ + y x $\frac{3}{4}$ = 3
y x $\frac{3}{4}$ = 3 – $\frac{5}{6}$
y x $\frac{3}{4}$ = 2$\frac{1}{6}$
y = 2 $\frac{1}{6}$ : $\frac{3}{4}$
y = 2$\frac{8}{9}$
Câu 2:
5$\frac{1}{6}$ – y : $\frac{3}{4}$ = $\frac{3}{5}$
y : $\frac{3}{4}$ = 5$\frac{1}{6}$ – $\frac{3}{5}$
y : $\frac{3}{4}$ = 4$\frac{17}{30}$
y = 4$\frac{17}{30}$ x $\frac{3}{4}$
y = 3$\frac{17}{40}$
Câu 3:
( 4,58 + y ) x 2,5 = 55,05
4,58 + y = 55,05 : 2,5
4,58 + y = 22,02
y = 22,02 – 4,58
y = 17,44
`a)“5/6+yxx3/4=3`
`yxx3,4=3-5/6`
`yxx3,4=13/6`
`y=13/6:3/4`
`y=26/9`
`b)“5 1/6-y:3/4=3/5`
`y:3/4=31/6-3/5`
`y:3/4=137/30`
`y=137/30xx3/4`
`y=137/40`
`c)“(4,58+y)xx2,5=55,05`
`4,58+y=55,05:2,5`
`4,58+y=22,02`
`y=22,02-4,58`
`y=17,44`