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(2314-(346+2x))+124=2036
2314-(346+2x) =2036-124
2314-(346+2x) =1912
346+2x =2314-1912
346+2x =402
2x =402-346
2x =56
x =56:2
x =28
![](https://rs.olm.vn/images/avt/0.png?1311)
11: Ta có: \(\left(x+3\right)^3=125\)
\(\Leftrightarrow x+3=5\)
hay x=2
12: Ta có: \(\left(2x\right)^4=16\)
\(\Leftrightarrow x^4=1\)
hay \(x\in\left\{1;-1\right\}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)Tìm x:
4x+6=3x-4
4x-3x=-4-6
x=-10
Vậy x=-10
c)Tính nhanh:
2315.(-2314+1)-2314.(1-2315)
=2315.(-2314)+2315-2314-2314.2315
=2315.(-2314+1-2314)-2314
=2315.(-4627)-2314
=-10711505-2314
=-10713819
![](https://rs.olm.vn/images/avt/0.png?1311)
B1:
a, 25-x=15
x=25-15 =10
b,9+2.x=3^7 : 3^4
9+2.x = 3^3
2.x=27-9
2.x=18
x=18:2=9
2:
a: 15x-9x+2x=72
=>17x-9x=72
=>8x=72
=>x=9
b:Sửa đề: 96-7*(x+1)=12^4:12^3
=>96-7(x+1)=12
=>7*(x+1)=84
=>x+1=12
=>x=11
c: 2^x*4=128
=>2^x=32
=>x=5
1:
c: 41-(2x-5)=18
=>2x-5=41-18=23
=>2x=28
=>x=13
d: \(2^{x-2}=11\)
mà x nguyên
nên \(x\in\varnothing\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2x-124=x+224\\ \Rightarrow2x+x=224+124\\ \Rightarrow3x=348\\ \Rightarrow x=348:3\\ \Rightarrow x=116\)
2\(x\) - 124 = \(x\) + 224
2\(x\) - \(x\) = 224 + 124
\(x\) = 348
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}\)\(=3\)
\(\Leftrightarrow\frac{x-152}{2011}+\frac{x-2135}{28}+\frac{x-2039}{124}=3\)\(\Leftrightarrow\left(\frac{x-152}{2011}-1\right)+\left(\frac{x-2135}{28}-1\right)+\left(\frac{x-2039}{124}-1\right)=3-1-1-1\)
\(\Leftrightarrow\frac{x-2163}{2011}+\frac{x-2163}{28}+\frac{x-2163}{124}=0\)
\(\Leftrightarrow\left(x-2163\right)\left(\frac{1}{2011}+\frac{1}{28}+\frac{1}{124}\right)=0\)
Vì \(\left(\frac{1}{2011}+\frac{1}{28}+\frac{1}{124}\right)>0\)
\(\Rightarrow x-2163=0\)
\(\Leftrightarrow x=2163\)
Vậy \(x=2163\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1014 : ( 124 - x ) = 13
124 - x = 1014 : 13
124 - x = 78
x = 124 - 78
x = 46
[ 2314 - ( 346 + 2x ) ] + 124 = 2036
[ 2314 - ( 346 + 2x ) ] = 2036 - 124
[ 2314 - ( 346 + 2x ) ] = 1912
346 + 2x = 2314 - 1912
316 + 2x = 402
2x = 402 - 316
2x = 86
x = 86 : 2
x = 43
[2314-(346+2x)]+124=2036
[2314-(346+2x)]=2036-134
[2314-(346+2x)]=1902
346+2x=2314-1902
346+2x=412
2x=412-346
2x=66
x=66/2
x=33
hok tốt