(89 x 12-2 x 6 x 89) + (145 x 54 + 146 x 45+ 100)
= ( 1068 - 1068) + ( 7830 + 6570 + 100)

= 0 + 7830 + 6570 + 100

= 14400 + 100

= 14500

0+14500=14500

x = 5

Tk mình đi

x=5

k minh nha ban

12 x 7 + x = 89

       84 + x = 89

              x = 89 - 84

              x = 5

ai k mik mik k lại

a ) x = 5 4 x = − 5 4 b ) x = 3 2 x = − 1 2 c ) x = 3 2 x = − 1 2

d ) x = 59 40 x = 61 40 e ) x = 1 3 x = − 1 f ) x = 1 3 x = − 1

125-12*(x-17) = 89

12.(x-17)= 125-89

12.(x-17) = 36

x-17 = 36:12

x-17 = 3

x= 3+17

x= 20

a x 89 + a x 12 + a x 9 = 715

a x ( 89 + 12 + 9 ) = 715

a x 110 = 715

==> a = 6,5                  Tk mk,mk k lại!!!!!!!!!!!!!!!!!

a*89+a*12+a*9=715

a*(89+12+9)=715

a*110=715

a=715:110

a=6,5

\(a\times89+a\times12+a\times9=715\)

           \(a\times\left(89+12+9\right)=715\)

                                 \(a\times110=715\)

                                              \(a=715:110\)

                                              \(a=6,5\)

Vậy \(a=6,5\)

\(a,123:x+12:x=4,5\\ \Rightarrow\left(123+12\right):x=4,5\\ \Rightarrow135:x=4,5\\ \Rightarrow x=30\\ b,89:x-5,15:x=62,5\\ \Rightarrow\left(89-5,15\right):x=62,5\\ \Rightarrow83,85:x=62,5\\ \Rightarrow x=1,3416\)

\(a,\Rightarrow\left(123+12\right):x=4,5\\ \Rightarrow135:x=4,5\\ \Rightarrow x=135:4,5=30\\ b,\Rightarrow\left(89-5,15\right):x=62,5\\ \Rightarrow83,85:x=62,5\\ \Rightarrow x=83,85:62,5=1,3416\)

12 + 34 + 56 + 78 + 123 + 99 + 322 + 199 = 1223

12 x 45 x 67 x 89 x 0 = 0

12 : 4 : 3 x 9 : 3 x 1259 = 3777

Tk nha

89-89+12-12=0

AI K MK MK K LẠI CHO

\(89-89+12-12=0\)

K MK MK K LẠI NHA