X+124:4=10659+159875-10265
10659+1958=?
Tính nhanh:
a) 124 : 0,25 + 6 x 124
b) 3/4 x 24,8 +12,4 x 8,5
c) 27,8 x (34,5 : 28,4) x 89,7 x (8 x 34 -34 : 0,125)
[124-(20-4.x)]:30=40
tìm x
`@` `\text {Ans}`
`\downarrow`
`[124 - (20 - 4x)] \div 30 = 40`
`\Rightarrow 124 - (20 - 4x) = 40 \times 30`
`\Rightarrow 124 - (20 - 4x) = 120`
`\Rightarrow 20- 4x = 124 - 120`
`\Rightarrow 20 - 4x = 4`
`\Rightarrow 4x= 20 -4`
`\Rightarrow 4x = 16`
`\Rightarrow x = 16 \div 4`
`\Rightarrow x = 4`
Vậy, `x = 4.`
[124-(20-4.x)]:30=40
=>124-(20-4x)=40*30
=>124-(20-4x)=120
=>20-4x=124-120
=>20-4x=4
=>4x-20-4
=>4x=16
=>x=16:4
=>x=4
[124-(20-4.x)]:30=40
=>124-(20-4x)=40*30
=>124-(20-4x)=120
=>20-4x=124-120
=>20-4x=4
=>4x-20-4
=>4x=16
=>x=16:4
=>x=4
Tính: 4 x 8 + 124
Tìm các số tự nhiên x, y biết :
a) 2x = 4y - 1 và 27y = 3x + 8
b) \(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}\)
x:5=124(dư 4)
x:5=124(dư 4)
x= 124x5+4
x=620+4
x=624
\(x : 5 = 124 \) ( dư \(4 \) )
\(x \) \(= 124 × 5 + 4 \)
\(x \) \(= 624\)
x : 5 = 124 ( dư 4 )
x = 124 x 5 + 4
x = 624
Tìm x
[124 − (20 – 4x)]: 30 = 4
\(\Rightarrow124-\left(20-4x\right)=120\\ \Rightarrow20-4x=24\\ \Rightarrow4x=-4\\ \Rightarrow x=-1\)
[ 124 - ( 20 - 4x ) ] : 30 = 4
=> [ 124 - ( 20 - 4x ) ] : 30 = 4
=> 124 - ( 20 - 4x ) = 120
=> 20 - 4x = 124 - 120
=> 20 - 4x = 4
=>4x = 20 - 4
=>4x = 16
=> x = 16 : 4
=> x = 4
Vậy x = 4 .
\(\left[124-\left(20-4x\right)\right]:30=4\)
\(\Leftrightarrow20-4x=4\)
hay x=4
a) -124 – (x – 42) = - 78 b) 2.(x – 4)3 = 4.30 + 4.2
a) -124-(x-42)=-78
x-42=-124+78
x-42=-46
x=-46+42
x=-4
b) 2(x-4)3=4.30+4.2
6(x-4)=128
x-4=128:6
x-4=21(3)
x=25(3)
tìm x biết x bằng :36+124:5+9^4