Use number sense to solve the equation. R/7-1=4 20 1.3 12 0.8

LOL, reinout!!!.....I thought about the second thing, too....I don't think it works, either!!!

Maybe our crystal ball needs some polishing  !!!!

None of these would work....R has to be divisible by 7.

(The answer is 35)

I give you;

No, I'm kidding, but I seriously don't know what they want you to do...

Do they want you to find the values of R

and do you mean [r/7-1] = $$\frac{r}{7}-1$$

or do you mean [r/(7-1)] = $$\frac{r}{7-1}$$