Question 21143
To make an equation for it, you have to carefully look at the statement and make some algebra statements of your own.

"Some number plus two" is (x + 2)
The product of that and 5 is 5*(x+2)
"Is" should hint that there is an equals sign.
So far we have 5*(x + 2) =
"The number times 8" means 8x
So eleven less than that is 8x-11.
Put it all together: 5(x+2) = 8x-11
Distribute the five. You have five times x *and* five times two.
5x + 10 = 8x - 11
Get all your x's to one side by subtracting 5x from both sides.
10 = 3x - 11
Now get your numbers together by adding eleven to both sides
21 = 3x
Divide by three.
7 = x