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315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
x - 36 : 18 = 12
x - 2 = 12
x = 12 + 2
x = 14
( x - 36 ) : 18 = 12
x - 36 = 216
x = 216 + 36
x = 252
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315+(146-x)=401
146 - x =401-315
146-x = 86
x =146-86
x =60
x-36:18=12
x - 2 =12
x =12-2
x =10
(x-36):18=12
x-36 =12x18
x-36 =216
x =216-36
x = 180
![](https://rs.olm.vn/images/avt/0.png?1311)
315 + (146 – x ) = 401
146 – x = 401 – 315
146 – x = 86
x = 146 - 86
x = 60
Vậy x = 60
![](https://rs.olm.vn/images/avt/0.png?1311)
\(124 - (118 - x) = 217\)
\(118-x=124-217\)
\(118-x=-93\)
\(x=118-\left(-93\right)\)
\(x=211\)
\(---\)
\(315+(146-x)=401\)
\(146-x=401-315\)
\(146-x=86\)
\(x=146-86\)
\(x=60\)
\(---\)
\(575-(6x+70)=445\)
\(6x+70=575-445\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=60:6\)
\(x=10\)
\(---\)
\(315+(125-x)=435\)
\(125-x=435-315\)
\(125-x=120\)
\(x=125-120\)
\(x=5\)
#\(Toru\)
124 - ( 118 - x ) = 217
118 - x =124-217
118 - x =-93
x=118-(-93)
x= 211
315 + ( 146 - x ) = 401 \
146 - x=401-315
146 - x= 83
x= 146-83
x=63
575 - ( 6x + 70 ) = 445
6x + 70=575-445
6x + 70=130
6x=130-70
6x =60
x=60:6
x=10
315 + ( 125 - x ) = 435
125 - x=435-315
124-x=120
x=124-120
x=4
![](https://rs.olm.vn/images/avt/0.png?1311)
135 + ( 146 - x) = 401
146 - x = 401 - 135 = 266
x = 146 - 266
x = -120
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f) 315 + (146 – x) = 401
(146 – x) = 401-315
(146 – x) = 86
x = 146 – 86
x = 60
Vậy x = 60
![](https://rs.olm.vn/images/avt/0.png?1311)
a. x - 17 = 115
x = 115 + 17
x = 132
b. 315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 60
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