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
a) (x-47) - 115 = 0
x - 47 - 115 = 0
x - (47+115) = 0
x - 162 = 0
x = 162
b) 315 + (146-x) = 401
315 + 146 - x = 401
461 - x = 401
x = 60
a) (x-47) - 115 = 0
x - 47 - 115 = 0
x - (47+115) = 0
x - 162 = 0
x = 162
b) 315 + (146-x) = 401
315 + 146 - x = 401
461 - x = 401
x = 60
a. (x-47)-115=0 b. 315+(146-x)=401
=> x-47=115 => 146-x=86
=> x = 115+47=162 => x = 146-86 = 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
k mk nhoaa
\(\left(x-47\right)-115=0\)
\(\Rightarrow x-47=115\)
\(\Rightarrow x=162\)
\(315+\left(146-x\right)=401\)
\(\Rightarrow146-x=86\)
\(\Rightarrow x=60\)
a)(x-47)-115=0
x-47=115
x=162
b)315+(146-x)=401
146-x=86
x=60
