The value of c + d can be found by dividing both sides of the given equation by 3. This yields c+d=
5
3
Choice A is incorrect. If the value of c+d is
3
5
,then 3×
3
5
=5; however,
9
5
is not equal to 5. Choice C is incorrect. If the value of c+d is 3, then 3×3=5; however, $$9 is not equal to 5. Choice D is incorrect. If the value of c+d is 5, then 3×5=5; however, 15 is not equal to 5.