Ta có: \(\left|x\right|-\left(6-\left|x\right|\right)=-4\)
\(\Leftrightarrow\left|x\right|-6+\left|x\right|=-4\)
\(\Leftrightarrow2\left|x\right|-6=-4\)
\(\Leftrightarrow2\left|x\right|=2\)
\(\Leftrightarrow\left|x\right|=1\)
\(\Leftrightarrow\left[{}\begin{matrix}x=1\\x=-1\end{matrix}\right.\)
Vậy: \(x\in\left\{1;-1\right\}\)
1, 7x+6(3-x)=27-20+73
2,6x-5(x-7)=(27-514)-486-73)
3,2x-6=3(x-5)+25+27-15-17
4, 4(x-5)-3(x+5)=2579-2578
5,/x-5/-7(x+4)=5-7x
6,3/x+4/-2(x-1)=7-2x
7, 2/x-6/+7x-2=/x-6/+7x
8,/x+8/+5(x-2)=5x-10:2
9, /x+2/-6(x-4)=20-6x
Tìm x thuộc z,biết.a,-4[x-5] bé hơn 0.b,[x-2][x-6]bé hơn 0
\(\left(x-2\right)^3+\frac{8}{27}=0\)
\(4\frac{1}{3}:\frac{x}{4}=6:0,3\)
(0,25-30%x).\(\frac{1}{3}-\frac{1}{4}=5\frac{1}{6}\)
\(\frac{x-2}{\frac{-2}{9}}=\frac{-2}{x-2}\)
Tim X :
a)x:1/3+2/3[1/5-1] =4
b)1/2 [x-3/5]=-1/3[7/6-3/2]
c)1/3-3/4=3/5 -x
d)4/7x-2/3=1/3+x
Tìm x biết:
a) 14 - |x| = -(11 - 17)
b) -(-15) + |x| = -(-21 - 14)
c) 6 -(|x| - 1) = -9
d) -5 + |x - 4| = -(-18)
Tìm x
/x/ + / x+1 / + / x+4 / +....+ | x + 20| -11x = 0
| x - 7 | + | y + 11 | = 2
|6-x| + |y+2| = 1
| x+1| + / x+2 / + / x+3 / +....+ | x + 10| =11x
Giúp tớ với ạ 😭
A. 5x=6×(x-1)
B.1×(3x)=(x+1)×2
C.3×(2x+1)=5×(x+2)
D.5×(7-x)=-4×(8x-2)
Cho x1 + x2 +x3+..........+x2016 + x2017 = 0 và x1 + x2 = x3 + x4 = x5 + x6 = .......... = x2015 +x2016 = x2016 + x2017 = 1
Tìm x2016
3. tìm số nguyên x biết:
a, - 14 - 7 + x = - 12 b, x + ( - 15) - ( - 6) = 11
