(x - 72) : 36 = 18

x - 72 = 648

x = 648 + 72

x = 720

Chúc bạn hok tốt nha!@

 ( x - 72 ) : 36 = 18

 ( x - 72 )        = 18 x 36

 ( x - 72 )        =    648

   x                  = 648 + 72

    x                  =     720

x-72= 18.36

x-72= 648

x    = 648+72

x    =720

72 + 36 x 2 + 24 x 3 + 18 x 4 + 12 x 6 + 168

= 72 + 72 + 72 + 72 + 72 + 168

= 72 x 5 + 168

= 360 + 168

= 528

=528.

x-72:36=18

x-2=18

x=18+2

x=20

1, x-72:36=18

x-2=18

=> x=20

2, \(\dfrac{x}{3}-\dfrac{1}{4}=\dfrac{-5}{6}\)

\(\dfrac{x}{3}=\dfrac{-7}{12}\)

12x= -21

->x= \(\dfrac{-21}{12}\)

x/3-1/4=-5/6

x/3=-5/6+1/4

x/3=-7/12

x=-7/12.3

x=-7/4

\(\dfrac{12+24+72}{18+36+108}=\dfrac{108}{162}=\dfrac{2}{3}=\dfrac{12}{18}=\dfrac{36}{54}\)

\(\dfrac{12-24+72}{18-36+108}=\dfrac{60}{90}=\dfrac{2}{3}=\dfrac{12}{18}=\dfrac{36}{54}\)

Ta có 

72+36.2+18.2.6

=36.2+36.2+36.6

=36.(2+2+6)

=36.10

=360 

Dấu . là nhân nha

dùng máy tính đi bn

tính nhanh mà

uk nhanh hơn tính tay nhìu

=   5544   

 k cho mk

=5544

tk minh nha

5544 nhé

x-72=18*36

x-72=648

x=648+72

x=720

Vậy x=720

=> x - 2 = 18

=> x = 18 +  2

=> x = 20

x-2=18

=)x=20

\(a,9x-8=838\)

\(9x=838+8\)

\(9x=846\)

\(x=846:9=94\)

\(b,\left(x+30\right)-75=125\)

\(x+30=125+75\)

\(x+30=200\)

\(x=200-30=170\)

\(c,x-72:36=18\)

\(x-2=18\)

\(x=18+2=20\)

#Urushi