Second problem of this video wrote:

the ratio of kids to adults of a different party is 3:5. If there are 26 more adults than kids, then how many kids are at the party?

I have another solution, let a set of kids and adults have $3$ kids and $5$ adults, then each set has $2$ more adults than kids, we need $26$ more adults, and since each set has $2$ more adults than kids, we need $13$ sets so that there are $26$ more adults than kids at the party, since a set of kids and adults has $3$ kids, there are $13\cdot 3 = 39$ kids at the party.

PREALGEBRA

ALGEBRA

COUNTING & PROBABILITY

MATHCOUNTS

AMC

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