![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
-2x - (x-17) = 34 - (-x+25)
-2x-x+17 = 34+x-25
-3x+17 = x+9
-3x-x = 9-17
-4x = -8
x = -8 : (-4)
x = 2
vậy____
![](https://rs.olm.vn/images/avt/0.png?1311)
(47 - 52). 3 + 27
= -5. 3 + 27
= -15 + 27
= 12
-4(39 - 19) + 30(-5 - 15)
= -4. 20 + 30. (-20)
= -80 - 600
= -680
36. (-9) + 9. (-64)
= -9(36 + 64)
= -9. 100
= -900
\(\dfrac{15}{17}+\dfrac{32}{17}=\dfrac{15+32}{17}=\dfrac{47}{17}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(x^{15}=x\Rightarrow x\in\left\{0;1\right\}\) d)Là ý b
b)\(\left(2x+1\right)^3=125\\ \left(2x+1\right)^3=5^3\Rightarrow2x+1=5\\ 2x=4\\ x=2\) e)\(\left(x-3\right)^2=25\\ \Rightarrow\left(x-3\right)^2=5^2\\ \Rightarrow\hept{\begin{cases}x-3=5\Rightarrow x=8\\x-3=-5\Rightarrow x=-2\end{cases}}\)
c)\(\left(x-5\right)^4=\left(x-5\right)^6\\ \Rightarrow x-5\in\left\{0;1\right\}\Rightarrow x\in\left\{5;6\right\}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1+ (-10) + 5 +(-7) +...+99+(-101)
= [ 1 + (-10) ] + [ 5 + (-7) ] +..[ 99+(-101)]
=(-9) + (-2) +...+ (-2)
=[ (-9) = (-2)] +...+ [ (-9) + (-2) ]
=(-11) +....+(-11)
=(-11) x 100
= -1100
![](https://rs.olm.vn/images/avt/0.png?1311)
7(x-3)-5(3-x)=11x-5
<=>7(x-3)+5(x-3)=11x-5
<=>(7+5)(x-3)=11x-5
<=>12(x-3)=11x-5
<=>12x-36=11x-5
<=>12x-11x=-5+36
<=>x=31
9,3 / 0,25+ 9,3/0,2+9,3?
-2x-3.(x-17) =34-2.(-x-25)
=> -2x-3.(x-17)+2.(-x-25)=34
=>-2x-3x+51+2.(-x)-50=34
=>-2x-3x-2x+1=34
=>x.(-2-3-2)=33
=>x.(-7)=33
=>x=-33/7