X x 10 x10 x10 x10 = 40000

X x 10000 = 40000

x = 40000 : 10000

x = 4

4 nha bạn

tk mình mình tk lại

kết quả bằng 4

nha bạn

4 nha bạn

tk nha bạn

X x 10000 = 40 000

      x         = 40 000 : 10 000

      x         =   4

tk nhé

x =4 

ai tk mk mk tk lại nha

30 + x = 40 + 60

30 + x = 100

x = 100 - 30

x = 70

10 + 90 = 40 + x

100 = 40 + x

x = 100 - 40

x = 60

30+x=40+60

30+x=100

     x=100-30

     x=70

10+90=40+x

100    =40+x

100-40=x

60      =x   

 30 + x = 40 + 60                                                      
 30 + x =    100
         x = 100 - 30
         x =      70
  10 + 90 = 40 + x
      100   = 40 + x
         x    =  100 - 40
         x    =       60
   

\(\frac{x+10}{90}+\frac{x+20}{80}+\frac{x+30}{70}+\frac{x+40}{60}+\frac{x+50}{50}=-5\)

<=> \(\frac{x+10}{90}+1+\frac{x+20}{80}+1+\frac{x+30}{70}+1+\frac{x+40}{60}+1+\frac{x+50}{50}+1=0\)

<=> \(\frac{x+100}{90}+\frac{x+100}{80}+\frac{x+100}{70}+\frac{x+100}{60}+\frac{x+100}{50}=0\)

<=> \(\left(x+100\right)\left(\frac{1}{90}+\frac{1}{80}+\frac{1}{70}+\frac{1}{60}+\frac{1}{50}\right)=0\)

<=> x + 100 = 0 

<=> x = -100

Vậy x = -100

a) 43 x 27 + 43 x 13 + 43 x 68

= 43 x ( 27 + 13 + 68 )

= 43 x 108

= 43 x ( 100 + 8 )

= 43 x 100 + 43 x 8 

= 4300  + 344

= 4644

b) 90 x 21 + 15 x 10 + 30 x 74

= 30 x 63 + 30 x 5 + 30 x 74

= 30 x ( 63 + 5 + 74 )

= 30 x 142

= 30 x ( 100 + 42 )

= 30 x 100 + 30 x 42

= 3000 + 1260

= 4260

a, 43x27+43x13+43x68

=43x(27+13+68)

=43x108

= 4644

b, 90x21+15x10+30x74

=9x10x21+15x10+3x10x74

=10x189+10x15+10x222

=10x(189+222+15)

=10x426

= 4260

Giải

a)43x27+43x13+43x68

=43(27+13+68)

=43x108

=43x100+43x8

=4300+344

=4644

b)90x21+15x10+30x74

=30x63+30x5+30x74

=30(63+5+74)

=30.142

=4260

A

10 x10 x20 x 30 =????

A. 60000

B. 80000

A

( 50 + 50 ) x 90 + ( 5 + 1000 ) x10 

= 100 x 90 + 1005 x 10

= 900 + 10050

= 10950

( 50 + 50 ) x 90 + ( 5 + 1000 ) x10 = 100 x 90 + 1005 x 10 

900 + 10050 = 10950

( 50 + 50 ) x 90 + ( 5 + 1000 ) x10 = 19050