How do i solve this problem 7 2/3 + n = 9 1/12

7 2/3+n=9 1/12
3•4=12
2•4=8
7 8/12+n = 9 1/12( these fractions have common denominators)
switch the operation (+ to -) and get the fraction by themselves
8/12-1/12=7/12
now subtract the whole numbers
9-7=2
finally answer 2 7/12

A: 18/15b : 7 - -8 = 15 , 12 - -6 = 18 the y variable always goes over the x variables, c : same thing a