tim x, biet
8,75x X + 1,35 x X = 20
b , 6,35 X x + 1,35 X x + 2,4 X x = 20
6.35*x+1.35*x+2.4*x=20
[6.35+1.35+2.4]*x=20
10.1*x=20
x=20:10.1
x=1.980198
b) 6,35 X x + 1,35 X x + 2,4 X x = 20
( 6,35 + 1,35 + 2,4 ) X x = 20
( 7,7 + 2,4 ) X x = 20
10,1 X x = 20
x = 20 : 10,1
x = 200/101
X x 1,2 + X x 1,8 = 1,35
X x 1,2 + X x 1,8 = 1,35
X x ( 1,2 + 1,8 ) = 1,35
X x 3 = 1,35
X = 1,35 : 3
X = 0,45
Vậy x = 0,45
X nhân(1,2+1,8)=1,35
X nhân3=1,35
X=1,35:3
X=0,45
1,25 x 3 < … x 2,6 < 1,35 x 4
1,25 x 3 < 2… x 2,6 < 1,35 x 4
`<=> 3,75 < x xx 2,6 < 5,4`
`=> (3,75)/(2,6) < x < (5,4)/(2,6)`
`=> 375/260 < x < 54/26`
`=> 75/52 < x < 27/13`.
Tìm x biết x + x : 0,2 = 1,35
x + x : 0,2 = 1,35
x * 1 + x * 5 = 1,35
x * ( 1 + 5 ) = 1,35
x * 6 = 1,35
x = 1,35 : 6
x = 0,225
X + X : 0,2 = 1,35
X + X. = 1,35 x 0,2
X + X = 0,27
X. = 0,3
x + x : 0,2 = 1,35
x . 1 + x . 5 = 1,35
x . ( 1 + 5 ) = 1,35
x . 6 = 1,35
x = 1,35 : 6
x = 0,225
Vậy x=0,225
Tìm x biết, x + x / 0,2 =1,35
Lời giải:
$x+\frac{x}{0,2}=1,35$
$x+x\times 5=1,35$
$x\times (1+5)=1,35$
$x\times 6=1,35$
$x=1,35:6=0,225$
4,95:x=1,35:x+1,2 x=
\(\frac{4,95}{x}=\frac{1,35}{x}+1,2\)
\(\Rightarrow\frac{99}{20x}=\frac{27}{20x}+\frac{6}{5}\)
\(\Rightarrow\frac{99}{20x}-\frac{27}{20x}=\frac{6}{5}\)
\(\Rightarrow\frac{72}{20x}=\frac{6}{5}\)
\(\Rightarrow\frac{18}{5x}=\frac{6}{5}\)
\(\Rightarrow x=\frac{18}{6}=3\)
Vậy x = 3
0,5 x 1,35 x X = 5,375 - 0,1581 : 0,06
0,5 x 1,35 x X = 5,375 - 0,1581 : 0,06
0,675 x X = 5,375 - 2,635
0,675 x X = 2,74
X = 2,74 : 0,675
X=\(\frac{548}{135}\)
X+X:0,2=1,35
\(x+x:0.2=1.35\)
\(x+x:\frac{1}{5}=1.35\)
\(x+5x=1.35\)
\(6x=1.35\)
\(x=1.35:6\)
\(x=0.225\)
\(x+x:0,2=1.35\)
\(x:1+x:0,2=1,35\)
\(x:\left(1+0,2\right)=1,35\)
\(x:1,2=1,35\)
\(x=1,35\cdot1,2=1,62\)
\(x\left(1+\frac{1}{0.2}\right)=1,35\)
\(6x=1,35\)
\(x=1,35:6=0,225\)
X+X:0,2=1,35
X+X:0,2=1,35
X+X*5=1,35
X*6=1,35
X=1,35:6
X=?
Bạn tự tính nhé
X + X : 0,2 = 1,35
X x 1 + X x 5 = 1,35
X x ( 1 + 5 ) = 1,35
X x 6 = 1,35
X = 1,35 : 6
X = 0,225
X+X:0,2=1,35
X+X*5=1,35
X*1+X*5=1,35
X*[1+5]=1,35
X*6=1,35
X=1,35:6
X=0,225
X
tinh nhanh 1,15 x 1,35 x 1,55 x 1,75 x .....2,55
x + x : 0,2 = 1,35
x * 1 + x * 5 = 1,35
x * ( 1 + 5 ) = 1,35
x * 6 = 1,35
x = 1,35 : 6
x = 0,225
hok tốt nha ^_^