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A \(\frac{2}{3}+y=\frac{11}{12}.5\)
\(\Rightarrow\frac{2}{3}+y=\frac{55}{12}\)
\(\Rightarrow y=\frac{55}{12}-\frac{2}{3}\)
\(\Rightarrow y=\frac{55}{12}-\frac{8}{12}\)
\(\Rightarrow y=\frac{47}{12}\)
bài 1 :
\(\frac{5}{12}\) + \(\frac{1}{3}\) = \(\frac{5}{12}\) + \(\frac{4}{12}\) = \(\frac{5+4}{12}\) = \(\frac{9}{12}\) = \(\frac{3}{4}\)
1 - \(\frac{3}{4}\) = \(\frac{4}{4}\) - \(\frac{3}{4}\) = \(\frac{4-3}{4}\) = \(\frac{1}{4}\)
2 x \(\frac{3}{11}\) = \(\frac{2x3}{11}\) = \(\frac{6}{11}\)
\(\frac{8}{7}\): 4 = \(\frac{8}{7x4}\) = \(\frac{8}{28}\) = \(\frac{2}{7}\)
bài 2 :
\(\frac{2}{5}\) : y = \(\frac{1}{3}\)
y = \(\frac{2}{5}\) : \(\frac{1}{3}\)
y = \(\frac{6}{5}\)
y : \(\frac{7}{11}\) = 22
y = 22 x \(\frac{7}{11}\)
y = 14
ai thấy đúng tk nha
y x 145 + y x 355 = 965000
y x ( 145 + 355 ) = 965000
y x 500 = 965000
y = 965000 : 500
y = 1930
k mk nha
y x 145 + y x 355 = 965000
y x (145 + 355) = 965000
y x 500 = 965000
y = 965000 : 500
y = 1930
(y - 22) : 213 = 206
y - 22 = 206 x 216
y - 22 = 43878
y = 43878 + 22
y = 43900
x = 5 y = 36
( 18 / 21 + 3 / 21 ) + ( 19 / 32 + 13 / 32 ) + ( 75 / 100 + 1 / 4 )
= 1 + 1 + 1 = 3
2008/2009 > 2010/2011 ; 1999/2001 < 12/11 ;2007/2006> 2006/2007 ; 101/100 >100/101
1.
x = 5
y = 36
2.
( 18 / 21 + 3 / 21 ) + ( 19 / 32 + 13 / 32 ) + ( 75 / 100 + 1 / 4 ) = 1 + 1 + 1 = 3
3.
> ; < ; > ; >
\(\frac{15}{22}\div\frac{y}{8}=\frac{4}{33}\)
\(\frac{y}{8}=\frac{15}{22}\div\frac{4}{33}\)
\(y=\frac{495}{88}\)
(not có chắc nha ;-;)
\(\frac{15}{22}\div\frac{y}{8}=\frac{4}{33}\)
\(\Leftrightarrow\frac{y}{8}=\frac{15}{22}\div\frac{4}{33}\)
\(\Leftrightarrow\frac{y}{8}=\frac{45}{8}\)
\(\Leftrightarrow y=45\)
Vậy y=45
Chúc bạn học tốt !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
y+32+y+12+y+22=99
<=>(y+y+y)+(32+12+22)=99
<=>3*y+66=99
=>3*y=99-66
=>3*y=33
=>y=33:3
=>y=11
y + 32 + y + 12 + y + 22 = 99
y+(32+12+22)=99
y+66=99
y=99-66
y=33