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135 - ( 2 - x ) = ( x - 934 ) - 16
\(\Leftrightarrow\) 135 - 2 + x = x - 934 - 16
\(\Leftrightarrow\) 135 - 2 + x = x - 950
\(\Leftrightarrow\) 0x = 950 - 135 + 2
\(\Leftrightarrow\) 0x = 717
\(\Leftrightarrow\) x \(\in\varnothing\)
135 + ( 121 - x ) = 231
121 - x = 231 - 135
121 - x = 96
x = 121 - 96
x = 25
x - 32 : 16 = 48
x- 2 = 48
x= 48 + 2
x = 50
\(\text{ x-1=-10-3}\)
\(x-1=-13\)
\(x=-12\)
\(\text{|x+2|=12+(-3)+|-4|}\)
\(\text{|x+2|}=12-3+4\)
\(\text{|x+2|}=13\)
\(\Rightarrow\orbr{\begin{cases}x+2=13\\x+2=-13\end{cases}\Leftrightarrow\orbr{\begin{cases}x=11\\x=-15\end{cases}}}\)
\(\text{|x+2|-12=-1}\)
\(\text{|x+2|}=11\)
\(\Rightarrow\orbr{\begin{cases}x+2=11\\x+2=-11\end{cases}\Leftrightarrow\orbr{\begin{cases}x=9\\x=-13\end{cases}}}\)
\(\text{|2x+3|=5}\)
\(\Rightarrow\orbr{\begin{cases}2x+3=5\\2x+3=-5\end{cases}\Leftrightarrow\orbr{\begin{cases}2x=2\\2x=-8\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=1\\x=-4\end{cases}}}\)
\(\text{135-|9-x|=35}\)
\(\text{|9-x|}=100\)
\(\Rightarrow\orbr{\begin{cases}9-x=100\\9-x=-100\end{cases}\Leftrightarrow\orbr{\begin{cases}x=-191\\x=109\end{cases}}}\)
chúc bạn học tốt
Bài 1 bạn tự là nhé dễ lắm :))
Bài 2 :
Ta có :
\(4x-15=-75-x\)
\(\Leftrightarrow\)\(4x+x=-75+15\)
\(\Leftrightarrow\)\(5x=-60\)
\(\Leftrightarrow\)\(x=\frac{-60}{5}\)
\(\Leftrightarrow\)\(x=-12\)
Bài 3 :
Ta có :
\(12⋮\left(x-3\right)\)\(\Rightarrow\)\(\left(x-3\right)\inƯ\left(12\right)\)
Mà \(Ư\left(12\right)=\left\{1;-1;2;-2;3;-3;4;-4;6;-6;12;-12\right\}\)
Suy ra : ( lập bảng )
\(x-3\) | \(1\) | \(-1\) | \(2\) | \(-2\) | \(3\) | \(-3\) | \(4\) | \(-4\) | \(6\) | \(-6\) | \(12\) | \(-12\) |
\(x\) | \(4\) | \(2\) | \(5\) | \(1\) | \(6\) | \(0\) | \(7\) | \(-1\) | \(9\) | \(-3\) | \(15\) | \(-9\) |
Vậy \(x\in\left\{4;2;5;1;6;0;7;-1;9;-3;15;-9\right\}\)
Chúc bạn học tốt
\(\frac{1}{8}\cdot16^x=2^x\)
\(\Leftrightarrow\frac{1}{8}=\frac{2^x}{16^x}\)
\(\Leftrightarrow\left(\frac{2}{16}\right)^x=\frac{1}{8}\)
\(\Leftrightarrow\left(\frac{1}{8}\right)^x=\frac{1}{8}\)
Suy ra x=1
a) \(\frac{304}{60}=\frac{9}{135}-x\)
\(\Rightarrow x=\frac{9}{135}-\frac{304}{60}\)
\(\Rightarrow x=-5\).
Vậy \(x=-5.\)
b) \(\frac{-1}{2}+\frac{16}{124}+x-\frac{5}{31}=\frac{2}{62}\)
\(\Rightarrow\frac{-1}{2}+\frac{4}{31}+x-\frac{5}{31}=\frac{1}{31}\)
\(\Rightarrow\frac{-1}{2}+x=\frac{1}{31}-\frac{4}{31}+\frac{5}{31}\)
\(\Rightarrow\frac{-1}{2}+x=\frac{2}{31}\)
\(\Rightarrow x=\frac{2}{31}-\frac{-1}{2}\)
\(\Rightarrow x=\frac{35}{62}\)
Vậy \(x=\frac{35}{62}\)
c) \(\frac{2}{17}+\frac{15}{24}-\frac{15}{27}-x-\frac{8}{23}=0\)
\(\Rightarrow\left(\frac{2}{17}+\frac{5}{8}-\frac{5}{9}\right)-x=\frac{8}{23}\)
\(\Rightarrow\frac{229}{1224}-x=\frac{8}{23}\)
\(\Rightarrow x=\frac{229}{1224}-\frac{8}{23}\)
\(\Rightarrow x=\frac{-4525}{28152}\)
Vậy \(x=\frac{-4525}{28152}\)
\(\Rightarrow x=\frac{385}{186}\).
135 - (2 - x) = ( x - 934) - 16
=> 135 - 2 + x = x - 934 - 16
=> 133 + x = x - 920
=> 133 + 920 = 2x
=> 1053 = 2x
=> x = 1053 / 2
135-(2-x)=(x-934)-16
(x-934)-(2-x)=135-16=119
2x-934-2=119
2x-932=119
2x=119+932
2x=1051
x=1051:2
x=525,5