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\(\Leftrightarrow y\times\left(5+2+1\right)=720\)
\(\Leftrightarrow y=720:8=90\)
\(y\times5+y\times2+y=720\)
\(y\times\left(5+2+1\right)=720\)
\(y\times8=720\)
\(y=720:8\)
\(y=90\)
![](https://rs.olm.vn/images/avt/0.png?1311)
5 x y + y +14 =37 x8
y x (5+1) +14 =296
y x 6 +14 =296
y x 6 =296-14
y x 6 = 282
y = 282:6
y=47
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(8 x 18 -5 x 18 -18 x3) x y + 2 x y =8 x 7 + 2
<=>144 x y -90 x y -54 x y + 2 x y = 58
<=>2 x y = 58
<=> y = 29
Vậy y = 29
Tìm y biết :
(8 x 18 - 5 x 18 - 18 x 3) x y + 2 x y = 8 x 7 + 2
[ 18 x ( 8 - 5 - 3 ) ] x y = 56 + 2
[ 18 x ( 8 - 5 - 3 ) ] x y = 58
( 18 x 0 ) x y = 58
0 x y + 2 x y = 58
2 x y = 58
y = 58 : 2
y = 29
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Lời giải:
$y\times 6+1+3+5+7+9=325$
$y\times 6+(1+3+5+7+9)=325$
$y\times 6+25=325$
$y\times 6=325-25=300$
$y=300:6=50$
![](https://rs.olm.vn/images/avt/0.png?1311)
Lời giải:
$y\times 6+1+3+5+7+9=325$
$y\times 6+25=325$
$y\times 6=325-25=300$
$y=300:6=50$
![](https://rs.olm.vn/images/avt/0.png?1311)
y×6+1+3+5+7+9=325y×6+1+3+5+7+9=325
y×6+(1+3+5+7+9)=325y×6+(1+3+5+7+9)=325
y×6+25=325y×6+25=325
y×6=325−25=300y×6=325−25=300
y=300:6=50
![](https://rs.olm.vn/images/avt/0.png?1311)
y.5+(2+4+6+...+18) = 270
y.5+(18+2).9:2=270
y.5+90=270
y.5=180
y=36
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32354 - y x 5= 11859
y x 5= 32354-11859
y x 5=20495
y= 20495 : 5
y= 4099
hok tốt
( y - 1908 ) x 5 + 140 = 835
( y - 1908 ) x 5 =835-140
( y - 1908 ) x 5 =695
y - 1908 =695:5
y - 1908 =139
y=139 +1908
y=2047
835-140:5+1908 là ra