Question

I have a doubt in maths like there is (7-r)(6-r)=12. so do I have to solve LHS or I can directly do (7-r)=12 , (6-r)=12 to find value of r, I ONLY WANT TO KNOW WHY WE HAVE TO SOLVE LHS FIRST!?
​

Answer 1

here is ur answer mate

Step-by-step explanation:

7-r=12

-r=12-7

-r=5

r=-5

6-r=12

-r=12-6

-r=6

r=-6