From the given information, you can summarize the data with these two equations.
C = .5E + 400
C + E = 2E - 29,600
Substitute .5E + 400 for C in the second equation and solve for E. Put that value in the first equation to find C. To check, put both values back in the second equation.
the population of Concord in 1980 was 400 greater than half the population Euclid. The sum of the two populations was 29,600 less than twice the population of Euclid. What was the population of each city in 1980?
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