Question

Karen is 13 years older than Juan. The sum of their ages is 55. How old is Juan?

Answer 1

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You want to use a system of equation to solve this.

K = 13 + J
K + J + 55.

Okay, so you see we already know what K is, so plug in K to the bottom equation and solve for J. Can you do that or me?

Answer 2

Juan is 21