2.3x+5=54
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a) 54 + ( 218 - x ) = 735
218 - x = 735 - 34
218 - x = 701
x = 218 - 701
x = -483
b) 96 - 3 ( x + 1 ) = 42
3 ( x + 1 ) = 96 - 42
3 ( x + 1 ) = 54
x + 1 = 54 : 3
x + 1 = 18
x = 18 - 1
x = 17
c) 5 ( x + 35 ) 515
x + 35 = 515 : 5
x + 35 = 103
x = 103 - 35
x = 68
d) 12x - 33 = 32 . 32
12x - 33 = 9.9
12x - 33 = 81
12x = 81 + 33
12x = 114
x = 114 : 12
x = 9,5
a) 54+(218-x)=735
218-x=681
x=-463
b) 96-3(x+1)=42
3(x+1)=54
x+1=18
x=17
c) 5(x+35)=515
x+35=103
x=68
d) 12x-33=3^2.2^2
12x-33=81
12x = 114
x=9,5
Nhấn đúng cho mk nha!!!!!!!!
\(\left(2\cdot3^x-54\right)\div5+2^4=4^2\)
\(\left(2\cdot3^x-54\right)\div5+16=16\)
\(\left(2\cdot3^x-54\right)\div5=0\)
\(2\cdot3^x-54=0\)
\(2\cdot3^x=54\)
\(3^x=54\div2\)
\(3^x=27\)
\(3^x=3^3\)
=> x = 3
hok tốt
1.4./x-5/-54=-34
4./x-5/=-34+54
4./x-5/=20
/x-5/=20:4
/x-5/=5
=>x-5=5 va x-5=-5
TH1:x-5=-5
=>x=0
TH2:x-5=5
=>x=10
2. /x-1/+(-5)=2
/x-1/=2-(-5)
/x-1/=7
=>x-1=7 va x-1=-7
TH1: x-1=7
=>x=8
TH2:x-1=-7
=>x=-6
vay x=-6 hoac x=8
a)197-9(x+3)=80
=>9(x+3)=197-80
=>9(x+3)=117
=>x+3=117:9
=>x+3=13
=>x=13-3=10
b)7(x-14)+35=56
=>7(x+14)=56-35
=>7(x+14)=21
=>x+14=21/7
=>x+14=3
=>x=3-14=(-11)
c)2.3x-1=54
=>3x-1=54:2
=>3x-1=27
=>3x-1=33
=>x-1=3
=>x=3+1=4
d)3.2x-1=24
=>2x-1=24:3
=>2x-1=8
=>2x-1=23
=>x-1=3
=>x=3+1=4
1) (-10)-|5-x|=(-12)
|5-x|=(-10)-(-12)
|5-x|=2
\(\Rightarrow\left[{}\begin{matrix}5-x=2\\5-x=\left(-2\right)\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=7\end{matrix}\right.\)
Vậy:............
\(2.3^{x+2}=54\)
\(\Leftrightarrow3^{x+2}=27\)
\(\Leftrightarrow3^{x+2}=3^3\)
\(\Leftrightarrow x+2=3\)
\(\Leftrightarrow x=1\)
2.3^x+2 = 54
3^x+2 = 54 : 2 = 27
3^x+2 = 3^3
=> x + 2 = 3
x = 3 - 2 = 1
2.\(3^{x+5}\) = 54
\(3^{x+5}\) = 54 : 2
3\(^{x+5}\) = 27
3\(^{x+5}\) = \(3^3\)
\(x+5\) = 3
\(x\) = 3 - 5
\(x=-2\)
Vậy \(x=-2\)