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
\(a,\left(x-47\right)-115=0\)
\(\Rightarrow\left(x-47\right)=115\)
\(\Rightarrow x=162\)
\(b,315+\left(146-x\right)=401\)
\(\Rightarrow\left(146-x\right)=86\)
\(\Rightarrow x=60\)
hok tốt~~
a) (x - 47) - 115 = 0
x = 115 + 47
x = 162
b) 315 + (146 - x) = 401
- x = 401 - 315 - 146
- x = -60
x = 60
a) (x - 47) - 115 = 0
x = 115 + 47
x = 162
b) 315 + (146 - x) = 401
- x = 401 - 315 - 146
- x = -60
x = 60
