Solving systems of equations by graphing Quick check

Find the coordinates of the intersection point that solves the system of these two linear equations in two variables: 2x + y = 15 and y = - x + 5 .

1 answer

To find the coordinates of the intersection point, we need to solve the system of equations by graphing.

First, rearrange the equations in slope-intercept form:
2x + y = 15
y = -x + 5

Now plot the two lines on a graph. The first line has a y-intercept of 15 and a slope of -2. The second line has a y-intercept of 5 and a slope of -1.

The two lines intersect at the point (5, 0).

Therefore, the coordinates of the intersection point that solves the system of equations are (5, 0).
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