See attached picture! Can you explain how this problem can be solved?

v

Step-by-step explanation:

i believe you'd do

3x+6+3x=84

isolate the variable by dividing each side by factors that don't contain the variable

to which i got 13

to check :

3(13)+6+3(13)=84

39+6+39=84

84=84

im not too sure though so im really sorry if its wrong

25/6

step-by-step explanation:

you multiply 4 by the denominator (4*6=24) and add it to the numerator which makes it 25/6.