Question 57727
If you have to solve this problem using the distrubtive property, try this.
Distribute the right side:
{{{24(11)-24(10)=24(f-10)}}}
{{{24(11)-24(10)=24(f) - 24(10)}}}
Comparing the left and right side shows that f must be 11, otherwise the two sides won't be equal.

The more traditional approach is just to solve for f:
{{{24*11-24*10 = 24(f-10)}}}
{{{264-240 = 24f-240}}}
{{{24 = 24f-240}}}
{{{24f=24+240}}}
{{{24f=264}}}
{{{f=264/24}}}
{{{f=11}}}