\(\Rightarrow x-5,01=4,02\)

\(\Rightarrow x=4,02+5,01\)

\(\Rightarrow x=9,03\)

x-5,01=7,02-2.1,5

x-5,01=7,02-3

x-5,01=4,02

      x=4,02+5,01

      x=9,03

a, 

\(\begin{array}{l}x - 5,01 = 7,02 - 2.1,5\\x - 5,01 = 7,02 - 3\\x - 5,01 = 4,02\\x = 4,02 + 5,01\\x = 9,03\end{array}\)

Vậy \(x=9,03\)

b, 

\(\begin{array}{l}x:2,5 = 1,02 + 3.1,5\\x:2,5 = 1,02 + 4,5\\x:2,5 = 5,52\\x = 5,52.2,5\\x = 13,8\end{array}\)

Vậy \(x=13,8\).

1) x - 5,01 = 7,02 - 2.1,5

x - 5,01 = 4,02

x = 4,02 + 5,01

x = 9,03

2) x : 2,5 = 1,02 + 3.1,5

x : 2,5 = 5,52

x = 5,52 x 2,5

x = 13,8

=>x-5,01=5,52

hay x=10,53

10.53

x-5,01=1,02+3×1,5

x - 5, 01 = 5,52

x = 5,52 + 5,01

x = 10,53

=>x-5,01=4,02

hay x=9,03

9.03

x=9.03 nhé

=>x*20%+x*80%=32

=>x*1=32

=>x=32

`x : 5 + x xx 80%=32`

`=> x xx 1/5 + x xx 4/5=32`

`=> x xx (1/5 +4/5)=32`

`=> x xx 1 =32`

`=>x=32:1`

`=>x=32`

` x : 1 / 2 + x : 1 / 3 + x : 1 / 4 + x = 2010`

`x . 2 + x . 3 + x . 4 + x = 2010`

`x ( 2 + 3 + 4 + 1 ) = 2010`

`x . 10 = 2010`

`x = 2010 : 10`

`x = 201`

Vậy ` x= 201`

\(=>x=2010:\left(2+3+4\right)=2010:9=\dfrac{670}{3}\)

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