Question

tìm x

a,\(\left(3\frac{1}{2}-2.x\right).3\frac{1}{3}=7\frac{1}{3}\)

b, \(\frac{4}{9}.x=\frac{9}{8}-0,125\)

c,\(\frac{-x}{21}=\frac{20}{7}\)

Answer 1

a) \(\left(3\frac{1}{2}-2x\right).3\frac{1}{3}=7\frac{1}{3}\)

 \(\left(\frac{7}{2}-2x\right).\frac{10}{3}=\frac{22}{3}\)

  \(\frac{7}{2}-2x=\frac{11}{5}\)

              \(2x=\frac{13}{10}\)

                \(x=\frac{13}{20}\)

Vậy ...

Answer 2

b) \(\frac{4}{9}x=\frac{9}{8}-0,125\)

   \(\frac{4}{9}x=1\)

         \(x=\frac{9}{4}\)

Vậy...

Answer 3

mình ko ghi đầu bài đâu nhé

a, 7/2-2x=22/3:10/3

   7/2-2x=11/5

  2x=7/2-11/5

  2x=13/10

  x=13/10:2

 x=13/20

Answer 4

câu a có người làm r nhé bn

b ) \(\frac{4}{9}.x=\frac{9}{8}-0,125\) 

 \(\frac{4}{9}.x=1\)

          \(x=1:\frac{4}{9}=\frac{9}{4}\)

Vậy x= \(\frac{9}{4}\)

c ) \(\frac{-x}{21}=\frac{20}{7}\)

       \(-x=\frac{20}{7}.21=60\)

Vậy x= 60

  

Answer 5

b, => 4/9.x=9/8-5/4

        4/9.x=-1/8

       x=-1/8:4/9

       x=-1/4

Answer 6

=> -x.7=21.20

    -x.7=420

    -x=420:7

  -x=60

=>x=60 

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