4x - 1 = 315
4x = 315 + 1
4x = 316
x = 316 : 4
x = 104
Ta có: 4x-1=315
\(\Leftrightarrow4x=315+1=316\)
hay x=79
Vậy: x=79
\(4x-1=315\)
\(4x=315+1=316\)
\(x=316:4=79\)
=> 4x= 315 +1 => 4x= 316 => x = 316 : 4 => x = 79
4x-1=315
4x = 315 + 1
4x = 316
x = 316:4
x = 79
4x - 1 = 315
4x = 315 + 1
4x = 316
x = 316 : 4
x = 104
4x-1=315
4x =315+1
4x =316
x =316:4
x =79