12 less than one-eleventh of some number, w"
Assuming you're asking what an algebraic expression would look like...
\(\frac{1}{11} w - 12\)
Let w be the number.
1/11w - 12
1/11w-12=0
1/11w-12+12=0+12
1/11w=12
1/11w÷1/11=12÷1/11
w = 132
Therefore, the equation would be 1/11w - 12 and the value of w is 132.
