a. x - 17 = 115 

x = 115 + 17 

x = 132 

b. 315 + ( 146 - x ) = 401

146 - x = 401 - 315 

146 - x = 86 

x = 60

315 + (146 – x ) = 401

146 – x = 401 – 315

146 – x = 86

x = 146 - 86

x = 60

Vậy x = 60

f) 315 + (146 – x) = 401

(146 – x) = 401-315

(146 – x) = 86

x = 146 – 86

x = 60

Vậy x = 60

a) ( x-47) - 115=0

x - 47 = 0 + 115 = 115

x= 115 + 47 = 162

b) 315 + ( 146 -x ) = 401

146 - x = 401 - 315 = 86

x= 146 -86 =60

a) \(\left(x-47\right)-115=0\)

\(x-47=115\)

\(x=115+47\)

\(x=162\)

b)\(315+\left(146-x\right)=401\)

\(146-x=401-315\)

\(146-x=56\)

\(x=146-56\)

\(x=90\)

a) \(\left(x-47\right)-115=0\)

\(x-47=0+115\)

\(x-47=115\)

\(x=115-47\)

\(x=68\)

b)\(315+\left(146-x\right)=401\)

\(146-x=401-315\)

\(146-x=86\)

\(x=146-86\)

\(x=60\)

a ) ( x - 47 ) - 115 =  0

    ( x - 47 )          = 0 + 115 

    ( x - 47 )          = 115

      x                   = 115 + 47

      x                   = 162

b ) 315 + ( 146 - x ) = 401

               ( 146 - x ) = 401 - 315

               (  146 - x ) = 86

                          x    = 146 - 86 

                          x    = 60

 Duyệt nha

a)  (x-47)-115=0=>x-47=115=>x=162

b)315+(146-x)=401=>146-x=86=>x=60

a,(x-47)-115=0

x-47=115

x=162

b,315+(146-x)=401

315+146-x=401

461-x=401

x=60

a) (x - 47) - 115 = 0

=> x - 47 = 0 + 115

=> x - 47 = 115

=> x = 115 + 47

=> x = 162

Vậy x = 162

b) 315 + (146 - x) = 401

=> 146 - x = 401 - 315

=> 146 - x = 86

=> x = 146 - 86

=> x = 60

Vậy x = 60

a, ( x - 47 ) - 115 = 0

x - 47 = 115

x = 162

b, 315 + ( 146 - x ) = 401

315 + 146 - x = 401

461 - x = 401

x = 60

a, 315 + (146 – x) = 401

ó 146 – x = 401 – 315

ó146 – x = 86

ó x = 146 – 86

ó x = 60

b, (x + 251) – 301 = 56

ó x + 251 = 56 + 301

ó x = 357 – 251

ó x = 106

c, (x – 29) – 11 = 0

ó x – 29 = 11

ó x = 11 + 29

ó x = 40

d, 103 – (x – 34) = 61

ó x – 34 = 103 – 6

ó x = 97 + 34

ó x = 13