Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
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 \(\in\varnothing\)
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
TH1: TH2:
-8(x-3)=24-16:2 -8(-x+3)=24-16:2
-8x+24=16 8x-24=16
-8x=16-24 8x=16+24
-8x=-8 8x=40
x=1 x=5
Vậy \(x\in1;5\)
-8/x-3/=24-16:2 Suy ra x-3=-8;8
-8/x-3/=24-8 x=11;-5
-8/x-3/=16
/x-3/=16+(-8)
/x-3/=8
\(\frac{x-2}{12}+\frac{x-2}{20}+\frac{x-2}{30}+..+\frac{x-2}{72}=\frac{16}{9}\)
\(\Rightarrow\left(x-2\right).\left(\frac{1}{12}+\frac{1}{20}+\frac{1}{30}+...+\frac{1}{72}\right)=\frac{16}{9}\)
\(\Rightarrow\left(x-2\right).\left(\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{8.9}\right)=\frac{16}{9}\)
\(\Rightarrow\left(x-2\right).\left(\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+...+\frac{1}{8}-\frac{1}{9}\right)=\frac{16}{9}\)
\(\Rightarrow\left(x-2\right).\left(\frac{1}{3}-\frac{1}{9}\right)=\frac{16}{9}\)
\(\Rightarrow x-2=0\Rightarrow x=2\)
Tim x:
a,-16+23+x=-16
x=-16+16+23
x=23
b,(x-1)-(-2)=0
x-1+2=0
x+1=0
x=-1
c,|x-1|=0
x-1=0
x=1
d,|9-x|=64+(-7)
\(|9-x|=57\)
\(\orbr{\begin{cases}9-x=57\\9-x=-57\end{cases}}\)
\(\orbr{\begin{cases}x=-48\\x=66\end{cases}}\)
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