x + 100 = 900

x = 900 - 100 

x = 800

x + 100 = 900

x = 900 - 100

x = 800

k mik nha

x+100=900

x=900-100

x=800 kb nhe

a.\(y:\dfrac{4}{5}=\dfrac{11}{8}\)

\(y=\dfrac{11}{8}\times\dfrac{4}{5}\)

\(y=\dfrac{11}{10}\)

b.\(\dfrac{11}{3}-y=\dfrac{1}{9}\)

\(y=\dfrac{11}{3}-\dfrac{1}{9}\)

\(y=\dfrac{32}{9}\)

c.\(\dfrac{1}{7}\times x=\dfrac{8}{5}\)

\(x=\dfrac{8}{5}:\dfrac{1}{7}\)

\(x=\dfrac{56}{5}\)

\(y=\dfrac{11}{8}.\dfrac{4}{5}\)

\(y=\dfrac{44}{40}\)

\(x=\dfrac{11}{3}-\dfrac{1}{9}\)

\(x=\dfrac{99-3}{27}=\dfrac{96}{27}\)

\(x=\dfrac{8}{5}:\dfrac{1}{7}\)

\(x=\dfrac{56}{5}\)

a)\(y=\dfrac{4}{5}\times\dfrac{11}{8}=\dfrac{44}{40}=1\dfrac{4}{40}\)

b)\(y=\dfrac{11}{3}-\dfrac{1}{9}=\dfrac{33}{9}-\dfrac{1}{9}=\dfrac{32}{9}\)

c)\(x=\dfrac{8}{5}\times7=\dfrac{56}{5}\)

x-5x=15-4=11

-4x=11

x=-11/4

thanks

=14*17*28/270

=6664/270=3332/135

123 x 123 + 123 = 15252

123 x 123 + 123 = 15252

số may mắn đó 

123x 124= 15252

{44+[22-12+82]}

=44+(10+82)

=44+92

=136

ủng hộ mik nhé

mik nhanh nhất

{44+[22-12+82]}={44+92}=136

  { 44 + [ 22 - 12 + 82 ] }

= { 44 + [ 10 + 82 ] }

=  44 +  92 

= 136

Đáp số : 136

203437 chia cho 305 = 6670065574 ok 

Không chia hết đâu bạn=203437/305

bạn ơi cho mình lại đề bài để làm cái

tìm x,y thuộc z nha bạn

123/124<124/125

123/124>123/125