Rex's present age is 2 years more than Scott's present age. If 'x' is Rex's age and 'y' is Scott's age, then which of the following linear equations represents this statement?

Let John's age be J, Emily's be E, Sarah's be S, and Michael's be M. The problem provides the equations J = E + 31, E = S + 3, and M = S - 5. The condition for three years from now is J + 3 = (E + 3) + (S + 3) + (M + 3), which simplifies to J = E + S + M + 6. Substituting the first three equations into this gives S + 34 = (S + 3) + S + (S - 5) + 6, which simplifies to S + 34 = 3S + 4. Solving for S gives S = 15, and since J = S + 34, John's present age is 49 years.

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