Tìm X
X x 84-X x 36-X x 38=1560
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
`@` `\text {Ans}`
`\downarrow`
`A.`
`x-56 \times 24 = 286`
`x-1344 = 286`
`x=286 + 1344`
`x=1630`
`B.`
`65 \times 54 - x = 1026`
`3510 - x =1026`
`x=3510 - 1026`
`x=2484`
`C.`
`36 \times 84 \div x = 72`
`3024 \div x = 72`
`x=3024 \div 72`
`x=42`
`D.`
`x \div 47 = 326 - 277`
`x \div 47 = 49`
`x= 49 \times 47`
`x=2303`
A. \(x-56\times24=286\\ x-1344=286\\ x=286+1344\\ x=1630\)
B. \(65\times54-x=1026\\ 3510-x=1026\\ x=3510-1026\\ x=2484\)
C. \(36\times84\div x=72\\ 3024\div x=72\\ x-3024\div72\\ x=42\)
D. \(x\div47=326-277\\ x\div47=49\\ x=49\times47\\ x=2303\)
tìm số tự nhiên x lớn nhất biết
a, 24 : x , 36 : x
b , 32 : x , 48 : x
c , 24 : x , 84 : x , 180 : x
a) 24 = 23 . 3
36 = 22 . 33
ƯCLN(24,36) = 22 . 3 = 4 . 3 = 12
b) 32 = 25
48 = 24 . 3
ƯCLN(32,48) = 24 = 16
c) 24 = 23 . 3
84 = 22 . 3 . 7
180 = 22 . 32 . 5
ƯCLN(24,84,180) = 22 . 3 = 4 . 3 = 12
\(a,-28+\left(23-x\right)=-6\)
<=>\(23-x=\left(-6\right)+28\)
<=>\(23-x=22\)
<=>\(x=1\)
\(b,84-4\)x\(\left(61-x\right)=|-36| \)
<=>\(4\)x\(\left(61-x\right)=84-36\)
<=>\(4\)x\(\left(61-x\right)=48\)
<=>\(61-x=12\)
<=>\(x=49\)
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
Ta có: -36/84=-3/7
=> 3/x=y/35=-3/7
3/x=-3/7
=> 3.7=-3.x
=> 21=-3.x
=> 21:(-3)=x
=> x=-7
y/35=-3/7
=> y.7=35.(-3)
=> y.7=-105
=> y =-105:7
=> y =-15
Vậy x=-7;y=-15
Cách nhanh hơn là:-36/84=-3/7
3/x=-3/7 suy ra x=-7
y/35=-3/7suy ra y=-15
c) 84:(324:18+36-x)+15=19
=> 84:(324:18+36-x)=19-15
=> 84:(324:18+36-x)=4
=> 324:18+36-x=84:4=21
=> 18+36-x = 21
=> 54-x = 21
=> x = 54-21
=> x = 33
84 : ( 18+36-x) +15= 19
84:(54-x)+15=19
84:(54-x) =19+15
84:(54-x)= 34
54-x =84:34
54-x =\(\frac{42}{17}\)
x = 54 - \(\frac{42}{17}\)
x= \(\frac{816}{17}\)
\(x \times 84-x \times 36-x \times 38=1560\)
\(x \times (84-36-38)=1560\)
\(x \times 10=1560\)
`x=1560:10`
`x=156`
\(84x-36x-38x=1560\\ \Rightarrow\left(84-36-38\right)x=1560\\ \Rightarrow10x=1560\\ \Rightarrow x=156\)