`x:25%+x:12,5%+7:1+x=200`

`x xx4+x xx8+7+x=200`

`x xx(4+8+1)=200-7=193`

`x xx13=193`

`x=193:13=193/13`

`;=:?`

25% nhân X+X+X nhân 1,25 =12,5

25%nhân X+X+X                  =12.5 chia 1,25

25%   nhân X nhân 3           =10

X  nhân   3                          =10 chia 25%

X  nhân   3                            =40

X                                             =40  chia 3

X                                           =13,3333.....................

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x = 13,333....... chứ gì

\(y\times12,5=150\Leftrightarrow y=150:12,5\Leftrightarrow y=12\)

y x 12,5 = 6 x 25

y x 12,5= 150

y= 12

đáp số y=12

y x 12,5 = 150

       y    = 150 : 12,5

       y     =    12

= 10+25+(-135)-(-100)

= (-100)-(-100)

= 0

12,5 * 2,5 + 12,5 * 7,5

a)

x .12 , 5 = 1 , 2 + 25 % x .12 , 5 = 1 , 2 + 0 , 25 x .12 , 5 = 1 , 45 x = 1 , 45 : 12 , 5 x = 0 , 116

b)

0 , 4 x − 1 5 x = 3 4 2 5 − 1 5 x = 3 4 1 5 x = 3 4 x = 15 4

=>x*8+x*25+x*20+x*4+27,2=112,7

=>57x=85,5

=>x=1,5

12,6 × x < 25

x < 25 : 12,5

x < 2

Vậy x = 0; x = 1

( 17/10+7-8,7) : (23/4 -11/2+ 9/25)x(12,98x0,25)+12,5 

=0: (23/4 -11/2+ 9/25)x(12,98x0,25)+12,5 

=0+12,5 

=12,5 

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