8,75*x+1,25*x=20
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\Rightarrow\) (8,75+1,25)*x = 20
\(\Rightarrow\) 10*x=20
\(\Rightarrow\) x = 2
mk nhanh nhất
( 8,75 + 1,25 ) * x = 20
10 * x = 20
x = 20 / 10
x = 2
đs : x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
( 8,75 + 1,25 ) * x = 20
10 * x = 20
x = 20 : 10
x = 2
T I C K nha Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy Nguyễn Văn Duy
![](https://rs.olm.vn/images/avt/0.png?1311)
8.75 x X + 1.25x X =20
X x ( 8.75+ 1.25) = 20
X x 10 =20
X = 20 : 10
X = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(8,75\cdot x+1,25\cdot x=20\)
\(=>x\cdot\left(8,75+1,25\right)=20\)
\(=>x\cdot10=20=>x=2\)
k nha xin đó
8,75 . x + 1,25 . x = 20
x .( 8,75 + 1,25 ) = 20
x . 10 = 20
x = 20 : 10
x = 2
Dấu x là . nha.Mk quen tay vậy ^^
# USAS - 12 #
![](https://rs.olm.vn/images/avt/0.png?1311)
\(8,75\text{ x }x+1,25\text{ x }x=20\)
\(\left(8,75+1,25\right)\text{ x }x=20\)
\(10\text{ x }x=20\)
\(x=20\text{ : }10\)
\(x=2\)
\(8.75\cdot x+1.25\cdot x=20\)
\(\left(8.75+1.25\right)\cdot x=20\)
\(10\cdot x=20\)
\(x=20:10\)
\(x=2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
8,75 x y + 1,25 x y = 26,3
(8,75 + 1,25 ) x y = 26,3
10 x y = 26,3
y = 26,3 : 10 ( TTS )
y = 2,63
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài làm :
Ta có :
\(8,75\times x+1,25\times2=26,3\)
\(\Leftrightarrow8,75\times x+2,5=26,3\)
\(\Leftrightarrow8,75\times x=26,3-2,5\)
\(\Leftrightarrow8,75\times x=23,8\)
\(\Leftrightarrow x=23,8\div8,75=2,72\)
Vậy x=2,72
Chúc bạn học tốt !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
8.75*x+1.25*x=20
x*(1.25+8.75)=20
x*10=20
x=20:10
x=2
k cho mh nha
(8,75 + 1,25) *x =20
10 * x =20
x = 20 : 10
x = 2