Question 503531
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to solve for y, let x be zero. 
-7(0)-8y=56.
-8y=56
y=-7 
to solve for x, let y be zero. 
-7x-8(0)=56 
-7x=56
x=-8. 
now just draw a graph, and plot the points (-8) on the x-axis and (-7) on the y-axis. make a line, and there you go.