X x 4 + X x 6 + X x 8 = 2016

        X x ( 4 + 6 + 8 ) = 2016

                     X x 18 = 2016

                            X = 2016 : 18

                            X = 112

X x (  4 + 6 + 8 ) = 2016

X x        18         = 2016

X                       =  2016 : 18

X                       = 112

x =112 nha bạn

`#3107.101107`

A,

\(2\times32\times12+4\times6\times41+8\times27\times3\\ =24\times32+24\times41+24\times27\\ =24\times\left(32+41+27\right)\\ =24\times100\\ =2400\)

B,

\(\left(2006\times2005^{2016}-2005^{2016}\right)\div2005^{2017}\\ =\left[2005^{2016}\times\left(2006-1\right)\right]\div2005^{2017}\\ =\left(2005^{2016}\times2005\right)\div2005^{2017}\\ =2005^{2017}\div2005^{2017}\\ =1\)

Help

2 x 3 x 12 + 4 x 6 x 42 + 8 x 27 x 3

= 2 x 12 x 3 + 4 x 6 x 42 + 8 x 3 x 27

= 24 x 3 + 24 x 42 + 24 x 27

= 24 x ( 3 + 42 + 27 )

= 24 x 72

= 1728

Nho tick cho minh nhe ban😁

\(\frac{2}{2.4}+\frac{2}{4.6}+\frac{2}{6.8}+....+\frac{2}{2014.2016}\)

\(=\frac{1}{2}-\frac{1}{4}+\frac{1}{4}-\frac{1}{6}+......+\frac{1}{2014}-\frac{1}{2016}\)

\(=\frac{1}{2}-\frac{1}{2016}\)

\(=\frac{1008}{2016}-\frac{1}{2016}=\frac{1007}{2016}\)

\(\frac{2}{2\times4}+\frac{2}{4\times6}+...+\frac{2}{2014\times2016}\)

=\(\left(\frac{2}{2}-\frac{2}{4}\right)+\left(\frac{2}{4}-\frac{2}{6}\right)+...+\left(\frac{2}{2014}-\frac{2}{2016}\right)\)

=\(\frac{2}{2}-\frac{2}{4}+\frac{2}{4}-\frac{2}{6}+...+\frac{2}{2014}-\frac{2}{2016}\)

=\(\frac{2}{2}-\frac{2}{2016}=\frac{1007}{1008}\)

= 112 nhe bạn k mình nheng chúc bạn học giỏi

\(4+x\cdot6+x\cdot8=2016\)

\(\Rightarrow x\cdot6+x\cdot8=2016-4\)

\(\Rightarrow x\cdot6+x\cdot8=2012\)

\(\Rightarrow x\cdot\left(6+8\right)=2012\)

\(\Rightarrow x\cdot14=2012\)

            \(x=2012:14\)

            \(x=\frac{1006}{7}\)

4 + x x 6 + x x 8 = 2016

x x 6 + x x 8 = 2016 - 4

x x 6 + x x 8 = 2012

x x ( 6 + 8 ) = 2012

x x 14 = 2012

       x = 2012 : 14

       x = ...

Ủng hộ nha

       x = 

Xx4+Xx6+Xx8=2016

Xx(4+6+8)=2016

Xx18=2016

X=2016/18

X=112

X = 2016 : (4+6+8)

X = 112

Xx4+Xx6+Xx8=2016

Xx(4+6+8)=2016

Xx18=2016

x=112

tôi không biết

a, 3 - 2x = 3 . (5 - x) + 4

    3 - 2x = 15 - 3x + 4

    -2x + 3x = 15 + 4 - 3

    x = 16

b, 4 - (7x + 2017) = 6 . (5 - x) - 2017

    4 - 7x - 2017 = 30 - 6x - 2017

    -7x + 6x = 30 - 2017 - 4 + 2017

    -x = 26

    x = -26

c, 15 - x . (x + 1) = 4 - x^2 + 2x

    15 - x^2 - x = 4 - x^2 + 2x

    -x^2 - x + x^2 - 2x = 4 - 15

    -3x = -11

    x = 11/3

d, -4 . (x - 5) + 2016 = 3 . (8 - x) - (2x - 2016)

-4x + 20 + 2016 = 24 - 3x - 2x + 2016

-4x + 3x +2x = 24 + 2016 - 20 - 2016

x = 4

đúng 100%