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The solution to the system is where the graphs intersect, the point of intersection.

The solution to the system is given by the point $(4,8).$

b

Use the same method here, graph the lines using their slopes and $y$-intercepts.

The intersection of the point is the solution to the system.

The solution to the system is $(-1,5).$

c

The lines in this system of equations are not written in slope-intercept form . In order to graph them, we'll rewrite them in this form to identify the slope and the $y$-intercept.

${3y=3x−6y+0.5x=-5 (I)(II) $

${y=x−2y+0.5x=-5 $

${y=x−2y=-0.5x−5 $

Now, we can graph the lines and see what the solution is.

We see that the solution is $(-2,4).$