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The equations of linear system are $\"\"$ .

Rewrite the equation 1: $\"\"$ in slope - intercept form.

Subtract x from each side.

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Divide each side by negative 3.

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Rewrite the equation 2: $\"\"$ in slope - intercept form.

Subtract x from each side.

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Multiply each side by negative 1.

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The two line equations have different slopes, so the system has one solution.

Observe the graph B, it contain two lines intersect at one point, so the system has one solution. $\"\"$

The linear system match with graph B and it has one solution.