Tìm x :
\(320\): \(x\)\(-\)\(10\)\(=\)\(5\)\(x\)\(48\): \(24\)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) (58 + x) : 5 = 18
58 + x = 18 x 5
58 + x = 90
x = 90 - 58
x = 32
d) 320 : x - 10 = 5 x 48 : 24
320 : x - 10 = 10
320 : x = 10 + 10
320 : x = 20
x = 320 : 20
x = 16
c) (1/15 + 1/35 + 1/63) . x = 1
1/9 . x = 1
x = 1 : 1/9
x = 9
a) 320 x 63 - 16 x 20 + 32 x 370
= 320 x 63 - 320 x + 320 x 37
= 320 x ( 63 - 1 + 37 )
= 320 x 99
= 320 x ( 100 - 1 )
= 320 x 100 - 320
= 32000 - 320 = 31 680
b) 35 x 61 + 215 x 5 + 35 x 39 + 57 x 25
= 5 x 427 + 5 x 215 + 5 x 273 + 5 x 285
= 5 x ( 427 + 215 + 273 + 285 )
= 5 x 1200 = 6000
c) 34 x 24 - 94 x 6 + 83 x 48 - 47 x 88
= 204 x 4 - 4 x 141 + 996 x 4 - 1034 x 4
= 4 x ( 204 - 141 + 996 - 1034 )
= 4 x 25 = 100
48-3(x+5)=24 1230:3(x-20)=10
3(x+5)=48-24 3(x-20)=1203:10
3(x+5)=24 3(x-20)= 120,3
x+5=24:3 x-20=120,3:3
x+5=8 x-20=40,1
x=8-5 x=40,1+20
x=3 x=60,1
mk nghĩ thế
\(48-3\left(x+5\right)=24\)
\(-3\left(x+5\right)=48-24\)
\(-3x-15=24\)
\(-3x=24+15\)
\(-3x=39\)
\(x=-13\in N\)
\(1230:3\left(x-20\right)=10\)
\(410\left(x-20\right)=10\)
\(x-20=\frac{10}{410}\)
\(x-20=\frac{1}{41}\)
\(x=\frac{1}{41}+20\)
\(x=\frac{821}{41}\in N\)
a)45-5 ( x - 2 ) = 20
5 ( x - 2 )=45-20
5 (x - 2 )=25
x - 2=25/5
x - 2=5
x = 5+2
x=7
b)3 (x-4)+24=96
3 (x-4)=96-24
3 (x-4)=72
x-4=72/3
x-4=24
x=24+4
x=28
2,
a) \(315-\left(135-x\right)=215\)
\(\Rightarrow135-x=315-215\)
\(\Rightarrow135-x=100\)
\(\Rightarrow x=135-100\)
\(\Rightarrow x=35\)
b) \(x-320:32=25\cdot16\)
\(\Rightarrow x-10=5^2\cdot4^2\)
\(\Rightarrow x-10=20^2\)
\(\Rightarrow x-10=400\)
\(\Rightarrow x=410\)
c) \(3\cdot x-2018:2=23\)
\(=3\cdot x-1009=23\)
\(\Rightarrow3\cdot x=1032\)
\(\Rightarrow x=1032:3\)
\(\Rightarrow x=344\)
d) \(280-9\cdot x-x=80\)
\(\Rightarrow280-x\cdot\left(9+1\right)=80\)
\(\Rightarrow280-10\cdot x=80\)
\(\Rightarrow10\cdot x=280-80\)
\(\Rightarrow10\cdot x=200\)
\(\Rightarrow x=20\)
e) \(38\cdot x-12\cdot x-x\cdot16=40\)
\(\Rightarrow x\cdot\left(38-12-16\right)=40\)
\(\Rightarrow x\cdot10=40\)
\(\Rightarrow x=40:10\)
\(\Rightarrow x=4\)
3) 5.(x-15)-75=0
5.(x-15)=75
x-15=15
x=15+15
x=30
8) 315+(146-x)=491
146-x=491-315
146-x=176
x=146-176
x=-30
6) 6.x-5=600+13
6.x-5=613
6.x=613+5
6.x=618
x=618:6
x=103
11)(x-17):8+52=158
(x-17):8=158-52
(x-17):8=106
x-17=106.8
x-17=848
x=848+17
x=865
7) (x-47).5-115=0
(x-47).5=115
x-47=115:5
x-47=23
x=23+47
x=70
10) 135-5.(x+37)=80
5.(x+37)=135-80
5(x+37)=55
x+37=55:5
x+37=11
x=11-37
x=26
13) 320:y-10=5.48:24
320:y-10=240:24
320:y-10=10
320:y=10+10
320:y=20
y=320:20
y=16
\(320\div x-10=5\cdot48\div24\)
\(320\div x-10=240\div24\)
\(320\div x-10=10\)
\(320\div x=10+10\)
\(320\div x=20\)
\(x=320\div20\)
\(x=16\)
\(320:x-10=5.48:24\)
\(320:x-10=240:24\)
\(320:x-10=10\)
\(320:x=10+10\)
\(320:x=20\)
\(x=320:20\)
\(x=16\)