The first equation is given in slope-intercept form but the second equation is not; so, let us convert the second equation to the slope-intercept form.
In the equation
adding 15x to both sides gives
and then dividing both sides by 5 gives
This equation has exactly the same equation as y = 3x + 5; therefore, the two lines are parallel.
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Mathematics, published 11.05.2023
Mathematics, published 23.03.2023