Hey there!
SIMPLIFY both sides of your equation:
4/7 = x + (-1/12)
FLIP the equation: x + (-1/12) = 4/7
Now, ADD by 1/12 on your sides
x + -1/12 + 1/12 = 4/7 + 1/12
Cancel out: -1/12 + 1/12 because it gives you 0
Keep: 4/7 + 1/12 because it solves for x
Thus, this means that x = 55/84
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst:)