# How many children are there?

Algebra Level 2

The sum of the children's ages is one-half the sum of the parent's ages. Two years ago, the sum of the parent's ages is $$28$$ less than thrice the sum of the children's ages. Twenty years from now, the sum of the children's ages is $$20$$ more than the sum of the parent's ages. How many children are there?

Clarification: parents is compose of a mother and a father

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