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Ta có:
y x 134 - y x 24 - y x 10 = 710 000
y x ( 134 - 24 - 10 ) = 710 000
y x 100 = 710 000
y = 710 000 : 100
y = 7 100
y * ( 134 - 24 - 10) = 710000
y * 100 = 710000
y = 710000 : 100
y = 7100
y x 134 - y x 24 - y x 10 = 710000
y x ( 134 - 24 - 10 ) = 710000
y x 100 = 710000
y = 7100
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y x 134 - y x 24 - y x 10 = 710000
= y x (134 - 24 - 10) = 710000
= y x 100 = 710000
y = 710000 : 100
y = 7100
\(\Rightarrow y\times\left(134-24-10\right)=710000\)
\(\Rightarrow y\times100=710000\)
\(\Rightarrow y=710000:100\)
\(\Rightarrow y=7100\)
Vậy y=7100
y x 123 - y x 10=710000
y x (123-10)=710000
y x 113=710000
y =710000:113
y=6283(dư 21)
\(y\times123-y\times10=710000 \)
\(\Rightarrow y\times\left(123-10\right)=710000\)
\(\Rightarrow y\times113=710000\)
\(\Rightarrow y=710000:113\)
\(\Rightarrow y=.........\)
1)\(y\times7:5+4\times8=134\)
\(\Leftrightarrow y\times7:5+32=134\)
\(\Leftrightarrow y\times7:5=102\)
\(\Leftrightarrow y\times7=510\)
\(\Leftrightarrow y=72,86\)
2) \(\dfrac{1}{4}:0,25-\dfrac{1}{8}:0,125+\dfrac{1}{2}:0,5-\dfrac{1}{10}\)
\(=0,25:0,25-0,125:0,125+0,5:0,5-\dfrac{1}{10}\)
\(=1-1+1-\dfrac{1}{10}\)
\(=\dfrac{9}{10}\)
a) y : 10 + y x 3,9 = 4,8
y x 0,1 + y x 3,9 = 4,8
y x ( 0,1 + 3,9 ) = 4,8
y x 4 = 4,8
y = 1,2
b)y : 0,25 + y x 11 = 24
y x 4 + y x 11 = 24
y x ( 4 + 11 ) = 24
y x 15 = 24
y = 1,6
c) 75% x y + 3/4 x y + y = 30
3/4 x y + 3/4 x y + y x 1 = 30
y x ( 3/4 + 3/4 + 1 ) = 30
y x 2,5 = 30
y = 12
\(y:0,25+y.11=24\)
\(\Leftrightarrow y.4+y.11=24\)
\(\Leftrightarrow y.\left(4+11\right)=24\)
\(\Leftrightarrow y.15=24\)
\(\Leftrightarrow y=\frac{24}{15}=\frac{8}{5}\)
yx134-yx24-yx10=710000
=>yx(134-24-10) =710000
=>yx100 =710000
y =710000:100
y =7100
chúc học tốt
y x 134 - y x 24 - y x 10 = 710000
y x (134-24-10) = 710000
y x 100 = 710000
y = 710000 : 100
y = 7100