5,6x2+2,8x8+11,2x2-48,5

=2,8x2x2+2,8x8+2,8x4x2-48,5

=2,8x4+2,8x8+2,8x8-48,5

=2,8x(4+8+8)-48,5

=2,8x20-48,5

=56-48,5

=7,5

\(26\times8+4\times13-10\times26\)
\(=26\times8+2\times2\times13-10\times26\)
\(=26\times8+2\times26-10\times26\)
\(=26\times\left(8+2-10\right)\)
\(=26\times0\)
\(=0\)
#Đang Bận Thở

\(26\times8+4\times13-10\times26\\ =13\times2\times8+4\times13-10\times2\times13\\ =13\times\left(2\times8+4-10\times2\right)\\ =13\times0\\ =0\)

y/8+yx8-56,78=138,22

yx(1/8+8)-56,78=138,22

yx8,125=138,22+56,78

yx8,125=195

y=195:8,125

y=24

Vậy y=24. k mk nha

y: 8 + y x 8 - 56,78 = 69,11 x 2  

yx1/8+yx8-56,78=69,11x2

yx(1/8+8)-56,78=138,22

yx8,125=138,22+56,78

yx8,125=195

y=195:8,125

y=24

y=24 nha

       y : 8 + y x 56,78 = 138,22

y x 0,125 + y x 56,78 = 138,22 ( chuyển : 8 sang x 0,125 vì 8 x 0,125 = 1)

 y x ( 0,125 + 56,78 ) = 138,22

                 y x 56,905 = 138,22

                             y    = 138,22 : 56,905

                             y    = ( tự tính nha)

\(y:8+y.56,78=69,11.2\)

\(y.0,125+y.56,78=138,22\)

\(y.\left(0,125+56,78\right)=138,22\)

\(y.56,905=138,22\)

                 \(y=138,22:56,905\)

                 y=(tự tính)

x : 8 + x * 8 - 56,78 = 69,11 9 * 2 

<=> x * 1/8 + x * 8 - 56,78 = 138,22

<=> x * ( 1/8 + 8 ) = 195

<=> x = 195 : ( 1/8 + 8 )

<=> x = 24

Vậy x= 24

Học tốt  ^.^ !

x:8+x*8-56.78=69.11*2

x:8+x*8-56.78=138.22

x:8+x*8=138.22+56.78

x:8+x*8=195

x*1/8+x*8=195

x*65/8=195

x       =195:65.8

x       =24

x : 8 + x : 8 - 56,78 = 69,11 x 2

x : 8 + x : 8 - 56,78 = 138,22

x : 8 + x : 8 = 138,22 + 56,78

x : 8 + x : 8 = 195

( x + x ) : 8 = 195

 x + x = 195 : 8 

 x + x = 24,375

x x 2 = 24,375

     x = 24,375 : 2

      x = 12,1875

x : 8 + x : 8 - 56,78 = 69,11 x 2

x : 8 + x : 8 - 56,78 = 138,22

x : 8 + x : 8 = 138,22 + 56,78

x : 8 + x : 8 = 195

( x + x ) : 8 = 195

 x + x = 195 : 8 

 x + x = 24,375

x x 2 = 24,375

     x = 24,375 : 2

      x = 12,1875

x : 8 + x . 8 - 56,78 = 69,11 . 2

x . 1/8 + x . 8 - 56,78 = 138,22

x . ( 1/8 + 8 ) = 138,22 + 56,78

x . 65/8 = 195

         x  = 195 : 65/8

         x  = 24

   145,8 x 4 - 53,85 + 5 x 145,8 - 46,15 + 145,8

= 145,8 x (4 + 5 + 1) - (53,85 + 46,15)

= 145,8 x 10 - 100

= 1458 - 100

= 1358

đáp án là 1358 nhé 

nhớ k cho mình nhé