Witch of the following lines is parallel to x=7

3y=7

Y=7

X=y

X=4

X=4 because they would have to run along each other. Parallel is two lines on the same plane meaning up and down or horizontal. For example, two Ls next to each other are parallel: ll, and the equal sign has two parallel lines: =. Therefore, x = means two Ls. So to find an equation that is parallel to x=7, you must find an equation that has a x = in it.