1. Identify that the slope of the given line y = 3x + 3 is 3.
2. Use the point-slope formula y - y_1 = m(x - x_1) with the point (3,3) and slope 3.
y - 3 = 3(x - 3)
3. Simplify to slope-intercept form:
y - 3 = 3x - 9
y = 3x - 6
Answer: y = 3x - 6
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