Remark
In order for the figure to be a parallelogram, the 2 parts of the same diagonal must be equal.
Equation
Therefore 79 - y = 2y + 22 Add y to both sides.
Solution
79 = 2y + y + 22 Combine
79 = 3y + 22 Subtract 22 from both sides
79 - 22 = 3y Combine like terms
57 = 3y Divide by 3 on both sides
57/3 = y Divide
19 = y
Answer y must be 19
Edit
For x you would have to obey the same principle.
3x + 1 = x + 27 Subtract x from both sides
3x - x + 1= 27 Combine like terms
2x + 1 = 27 Subtract 1 from both sides
2x= 27 - 1 Combine the right
2x = 26 Divide by 2 on both sides.
2x/2 = 26/2
x = 13
