Product of 4 and a number translates to 4x because the word product means multiplication. We then need to subtract one from that which would be 4x - 1. The word is translates to "equals" so 4x - 1 = 11 is the translation of the whole problem.
Now solve that equation. 4x - 1 = 11 1st add +1 +1 2nd simplify 4x = 12 3rd divide. 4 4 x = 3