A gallon of paint covers 1 1/3 walls. How many gallons does it take to cover 1 wall? How about 3 walls?
1 answer:
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For each equation give X a value and solve for Y, do this at least two times for each equation.
Plot those dots on a graph to draw two lines.
The solution is where the two lines cross.
You will see the lines cross at (-1,-2)
