x*98+x*0,5=125

x*(98+0,5)=125

x*99,5=125

x=125:99,5

x=1,256281407

x*98+x*0,5=125

x*(98+0,5)=125

x*98,5=125

x=125:98,5

x=12312,5

x.(98+0,5)=125

x.98,5=125

x=125:98,5

x=1,269035533

52000 tick minh nha help me plaseeeeeeeeeee.......!!!!

A=[(38+17)+125]+29

A=175+29

A=204

B=312.3

B=936

C=1+1+1+1+1

C=5

D=(125:5).(36:9)

D=25.4

D=100

x = 5

k nha ^_^

125-3(x+4)=98

      3(x+4)=125-98

      3(x+4)=27

        (x+4)=27:3

        (x+4)=9

            x=9-4

            x=5

\(125-\left(-275\right):\left\{\left[165-\left(84-18\right)\right]:\left(-3^2\right)\right\}\)
\(=125+275:\left\{\left[165-\left(84-18\right)\right]:\left(-9\right)\right\}\)
\(=125+275:\left\{\left[165-66\right]:\left(-9\right)\right\}\)
\(=125+275:\left\{99:\left(-9\right)\right\}\)
\(=125+275:\left(-11\right)\)
\(=125+\left(-25\right)\)
\(=100\)

=125.(98-46)-52.25

=125.52-52.25

=(125-25).52

=100.52

=5200

chú ý . là nhân

( x + 1 ) + ( x + 2 ) + ... + ( x + 98 ) + ( x + 99 ) = 9900

( x + x + ... + x + x ) + ( 1 + 2 + ... + 98 + 99 ) = 9900

99.x + \(\frac{\left(99+1\right).99}{2}\)= 9900

99.x + 4950 = 9900

99.x = 9900 - 4950

99.x = 4950

x = 4950 : 99

x = 50

2 . x + 5 . x - 3 . x = 125 : 4 + 27 : 3

x . ( 2 + 5 - 3 ) = 31,25 + 9

x . 4 = 40,25

x = 40,25 : 4

x = 10,0625

phan thuhai???