They are parallel so that means that they are congruent (equal) 19x-31=11x+1 So now you solve like a normal equation
Let’s move things around, variables to the left, non variables to the right (remember that when moving to different sides they become opposites, [adding becomes subtraction, subtraction becomes addition])
19x-11x=31+1
Now add/subtract like terms 19x-11x=8x 31+1=32
New equation 8x=32
Now you divide 32/8 which would be 4
The value of x is 4
So now to get the value of YZ you plug in the value of X where you see an X
