To determine if (5,15) is a solution of the equation y = 3x, we substitute x = 5 and y = 15 into the equation.
3x = y
3(5) = 15
15 = 15
Since the equation is true when x = 5 and y = 15, (5,15) is indeed a solution of the equation.
y = 3x; (5,15) Is (5,15) a solution of the given equation
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