Tìm x:
a, 2125 : x - 125 : x = 100
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2125 : X - 125 : X = 100
<=> ( 2125 - 125 ) : X = 100
<=> 2000 : X = 100
=> X = 2000 : 100
X = 20
2125:X-125:X
=>(2125-125):X=100
=>2000:X =100
=>X =2000:100
=>x =20
125 . x - x . 47 = 25350
x . ( 125 - 47 ) = 25350
78x = 25350
=> x = 325
`#040911`
`a)`
`6 \times x - 5 = 613`
`=> 6 \times x = 613 + 5`
`=> 6 \times x = 618`
`=> x = 618 \div 6`
`=> x = 103`
Vậy, `x = 103`
`b)`
`12 \times x + 3 \times x = 30`
`=> x \times (12 + 3) = 30`
`=> x \times 15 = 30`
`=> x = 30 \div 15`
`=> x = 2`
Vậy, `x = 2`
`c)`
`125 - 25 \times (x - 1) = 100`
`=> 25 \times (x - 1) = 125 - 100`
`=> 25 \times (x - 1) = 25`
`=> x - 1 = 25 \div 25`
`=> x - 1 = 1`
`=> x = 1 + 1`
`=> x = 2`
Vậy, `x = 2`
`d)`
`(x - 2) \times (9x - 4) = 0?`
`=>`
TH1: `x - 2 = 0`
`=> x = 0 + 2`
`=> x = 2`
TH2: `9x - 4 = 0`
`=> 9x = 4`
`=> x = 4/9`
Vậy, `x \in {2; 4/9}.`
\(a,6x-5=613\\ \Leftrightarrow6x=618\\ \Leftrightarrow x=103\\ b,12x+3x=30\\ \Leftrightarrow15x=30\\ \Leftrightarrow x=2\\ c,125-25\left(x-1\right)=100\\ \Leftrightarrow25\left(x-1\right)=25\\ \Leftrightarrow x-1=1\\ \Leftrightarrow x=2\\ d,\left(x-2\right)\cdot\left(9x-4\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=2\\x=\dfrac{4}{9}\end{matrix}\right.\)
a, X x 186-Z x 86=3400
X x (186-86) =3400
X x 100=3400
X= 3400: 100
X= 34
b, X x 75+57 x X =32604
X x (75+57)=32604
X x 132=32604
X= 32604 : 132
X = 247
c, 216: X +34: X =10
(216+34) : X=10
250 : X =10
X= 250:10
X= 25
d, 2125:X -125 :X=100
(2125-125) :X= 100
2000: X=100
X= 2000:100
X= 20
a) \(x\times186-x\times86=3400\)
\(x\times\left(186-86\right)=3400\)
\(x\times100=3400\)
\(x=3400:100\)
\(x=34\)
b) \(x\times75+57\times x=32604\)
\(x\times\left(75+57\right)=32604\)
\(x\times132=32604\)
\(x=32604:132\)
\(x=247\)
c) 216 : x + 34 : x = 10
(216 + 34) : x = 10
250 : x = 10
x = 250 : 10
x = 25
d) 2125 : x - 125 : x = 100
(2125 - 125) : x = 100
2000 : x = 100
x = 2000 : 100
x = 20
a (X:10)+37=60
X:10=23
X=2,3
b 25xX-15xX=72
X(x25-15)=72
Xx10=72
X=7,2
c 138-(Xx5)=38
Xx5=100
X=20
d (Xx9):52=18
Xx9=936
X=104
e 52xX+48xX=100
Xx(52+48)=100
Xx100=100
X=1
f 623xX-123xX=1000
Xx(623-123)=1000
Xx500=1000
X=2
g Xx16+84xX=700
Xx(16+84)=700
Xx100=700
X=7
h 236xX-Xx36=2000
Xx(236-26)=2000
Xx200=2000
X=10
i 216:X+34:X=10
(216+34):X=10
250:X=10
X=25
f 2125:X-125:X=100
(2125-125):X=100
2000:X=100
X=20
(2125-125):x=100
2000:x=100
x=2000:100
x=20
a,
2125:X-125:X=100
=>[2125-125]:X=100
=>2000:X=100
=>X=2000:100
=>X=20
Vậy X=20