a) 24 x ( 3 + 5)

= 24 x 3 + 24 x 5 

= 72 + 120

= 192

or:

24 x ( 3+5)

= 24 x 8

= 192

Mấy phần kia tương tự bạn nhé

Cảm ơn bạn nhiều

a)2012÷x+23=526

2012 : x = 503

x = 4

b)1/2÷x+9,44=18,36

1/2 : x = 8,92

x = 25/446

c)x-3/4=6×1/24

x - 3/4 = 1/4

x = 1

~.~

a) 2012 : x + 23 = 526

2012 : x =526 -23

2012:x =503

b) x +  9,44 = 18,36

x =18,36 - 9 ,44

x =8,92

c) x - 3/4 = 6 * 1/24

x - 3 / 4 = 1 /4

x = 3/ 4 + 1 / 4

x = 1

d) x + 2/3 = 18 : 9 - 1

x + 2 / 3 = 1

x =1 - 2 / 3

x = 1 / 3

Chúc học tốt 

\(a,x=4\)

\(b:^{ }x=8,92\)

\(c;x=1\)

\(d,x=\frac{1}{3}\)

a) \(x+9,44=18,36\)

\(\Leftrightarrow x=18,36-9,44\)

\(\Leftrightarrow x=8,92\)

b) \(2012\div x+23=526\)

\(\Leftrightarrow2012\div x+23=526\)

\(\Leftrightarrow2012\div x=526-23\)

\(\Leftrightarrow2012=503\times x\)

\(\Leftrightarrow x=2012\div503\)

\(\Leftrightarrow x=4\)

a). 125 x 12 + 12 x 874 + 12

=(125+874+1)x12

=1000x12

=12000

b). 34,64 x 46 + 34,64 x 53 + 34,64

=34,64x(46+53+1)

=34,64x100

=3464

c). 456 x 45 + 456 x 10 – 456 x 55

=456x(45+10-55)

=456x0

=0

a) 125 x12 +12 x 874 + 12 x 1

=12 x (125 + 874 + 1)

=12 x 1000

=12000

b)34,64 x 46 + 34,64 x 53 +34,64 x 1

=34,64 x (46 + 53 + 1)

=34,64 x 100

=3464

c) 456 x 45 +456 x 10 - 456 x 55 

=456 x (45 +10 - 55)

=456 x 0

= 0

a=12000

b=3464

c=0

a, 2015 : (x + 53) = 5

       x+53=403

       x=350

b, 3/4 +1/4 : x = 2

          1/4 : x = 5/4

                x = 1/5

k nhé

a)<=>A>hoặc=|x-2016+2015-x| <=>A>hoặc= 1 với mọi x

=>Amin=1 khi (x-2016).(2015-x)>hoặc =0

=>2015<hoặc=x<hoặc=2016

x- \(\dfrac{1}{2}\) = 6 x \(\dfrac{1}{24}\)

x- 0,5 = 6 x \(\dfrac{1}{24}\)

x- 0,5 = \(\dfrac{1}{4}\) 

x- 0,5 = 0,25

x        = 0,25+0,5

x        =0,3

x - 1/2 = 6 x 1/24 

x - 0,5 = 1/4

x - 0,5 = 0,25 

x = 0,25 + 0,5 

x = 0,3