Answer: 3
Explanation:
5 times a number; This means 5 times a unknown, so we shall say x.
5x
If it says "and" after this, we add, so 3
5x+3
"Is equal" means an equal sign:
5x + 3 =
"9 times the number minus 9". This is again the variable times 9 minus 9;
5x +3 = 9x - 9
Solving this equation we get 3.