a) 19 + (x - 23) = 50
x - 23 = 50 - 19
x - 23 = 31
=> x = 31 + 23
x = 54
b) (273 - x) - 140 = 34
(273 - x) = 34 + 140
(273 - x) = 174
x = 273 - 174
x = 99
c) 56 - (x - 14) = 22
x - 14 = 56 - 22
x - 14 = 34
x = 34 + 14
x = 48
d) 172 - (137 - x) = 93
137 - x = 172 - 93
137 - x = 79
x = 137 - 79
x = 58
e) 13. (x - 14) = 91
x - 14 = 91 : 13
x - 14 = 7
x = 14 + 7
x = 21
g) (13 - x).17 = 51
13 - x = 51 : 17
13 - x = 3
x = 13 - 3
x = 10
chúc bn học giỏi ^^ !
ok mk nha!! ! 5654645645767676576558578779769675634636457567687689978978978978766876765657886567567
1.19+(x-23)=50
<=>x-23=50-19
<=>x-23=31
<=>x=31+23
<=.x=54
vậy x=54
2.(273-x)-140=34
<=>273-x=34+140
<=>273-x=174
<=>x=273-174
<=>x=99(thoả mãn)
vậy x=99
Làm nhiều thế này là phải k nha
1) 19+(x-23)=50
( x - 23 ) = 50 - 19
( x - 23 ) = 31
=> x = 31 + 23
x = 54
2)(273-x) -140=34
( 273 - x ) = 34 + 140
( 273 - x ) = 174
=> x = 273 - 174
x =
56-(x-14)=22
( x - 14 ) = 56 - 22
( x - 14 ) = 34
=> x = 34 + 14
x = 48
4)172-(137-x)=93
( 137 - x ) = 172 - 93
( 137 - x ) = 79
=> x = 137 - 79
x = 58
5)13.(x-14)=91
( x - 14 ) = 91 : 13
( x - 14 ) = 7
=> x = 7 + 14
x = 21
6)(13-x).17=51
( 13 -x ) = 51 : 17
( 13 - x ) = 3
=> x = 13 - 3
x = 10
1)\(19+\left(x-23\right)=50\)
\(x-23=50-19\)
\(x-23=31\)
\(x=31+23\)
\(x=54\)
2)\(\left(273-x\right)-140=34\)
\(273-x=34+140\)
\(273-x=174\)
\(x=273-174\)
\(x=99\)
3)
\(56-\left(x-14\right)=22\)
\(x-14=56-22\)
\(x-14=34\)
\(x=34+14\)
\(x=48\)
4)\(172-\left(137-x\right)=93\)
\(137-x=172-93\)
\(137-x=79\)
\(x=137-79\)
\(x=58\)
5)\(13.\left(x-14\right)=91\)
\(x-14=91:13\)
\(x-14=7\)
\(x=7+14\)
\(x=21\)
6)\(\left(13-x\right).17=51\)
\(13-x=51:17\)
\(13-x=3\)
\(x=13-3\)
\(x=10\)
\(x=21\)
\(x=7+14\)
\(273-x=174\)
