To solve the above inequality we will try to isolate j by using the opposite operation of a number that we want to remove. So,

Add 8 to each sides.
By combining the like terms.
Multiply each sides by 4 to isolate j.
j<48 By simplifying.
So, the answer is j<48.
Can you add the picture ?? If you don’t mind?? It helps me Answer better
The answer is “x”. “x” represents the missing number in the problem.
Example:
16+x=20
The missing number, 4, would be represented as x. Hope this helps!
The answer is 6.875 ish. not exact
He can make 12 or 9 because 9x4=36 and 12x3=36