x-8=15
When it says 8 less than that means that you are subtracting 8 from you're equation. The question also states from a number means that the 8 will be behind the variable and subtracted. They also give you the original answer before finding x. So to solve for "x" you have to isolate it. To isolate it you would add 8 from the left hand side (leaving x) and then add 8 to 15 on the right hand side. That would then give you youre answer of
x=23.
Hope it helps!
Let the number we have to find be x, Then:-
x - 8 = 15
x - 8 + 8 = 15 + 8
x = 23 answer
