315+(146-x)=401
146-x=401-315
146-x=86
x=60
\(315+\left(146-x\right)=401\\ \Leftrightarrow146-x=401-315=86\\ \Leftrightarrow x=146-86=60\)
315 + ( 146 - x) = 401
146 - x = 401 - 315 = 86
x = 146 - 86
x = 60
Hok tốt^^
Ta có: \(315+\left(146-x\right)=401\)
\(\Leftrightarrow146-x=86\)
hay x=60
315+ (146- x) = 401
146-x =401-315
→146-x= 86
→x= 146-86
→x= 60
Vậy: x= 60
315+ (146- x) = 401
→146-x =401-315
→146-x= 86
→x= 146-86
→x= 60
Vậy: x= 60