first you want to put the W's on one side and the U's on the other. we can do this by subtracting 4u from the left side and the right side making the equations 8w=-7u+2w.
next we want to subtract 2w from both sides making the equation 6w=-7u then we divide by 6 to get w=-1.16u
Line 1 is parallel and slope -1.33333 or -4/3 Line 2 is parallel and slope 0.75 or 6/8 Line 3 is parallel and slope 0.75 or -3/-4 i got the answers on Omni calculator