Answer:
7*6-x
or
42-x
Step-by-step explanation:
decrease means subtraction,
product means multiplication
let x be the number you are decreasing by.
I am not really sure how to explain this, but here I go.
you take away x from the number that equals 6*7.
6*7 is 42 and you take away x from that, you get 42-x
or if you want to leave it unsimplified,
6*7-x
