5. If 56 is x, then 336-x-x-x-x-x=0. This can be shortened to 336-5x=0, and by adding 5x to each side we get 336=5x. If we substitute the number back in, we get 336=5x52.

56 ÷ 168 = 56/168 = (1×56)/(3×56) = 1/3 ---------------------------------------------------- If your first language is not English (but likely Spanish), then you may have meant 168 ÷ 56 (168 divided by 56) = 3