Solving graphically equations

How do i work these x=y-1,2x=3y solving each system graphically?

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... x=0, y=1, when y=0, x=-1. Thus the line passes through points (0,1) and (-1, 0).

For line 2x=3y. when x=0, y=0, when x=1, y=2/3. (or when x=3, y=2, since 2/3 can not be drawn very accurately) Thus the line passes through points ...