The population of a city is 2500.if the number of males is 240 more than the number of females, how many makes and females are there in the city?
Let M be the number of males
Let F be the number of females.
F + M = 2500 (The population of a city is 2500)
M = F + 240 (the number of males is 240 more than the number of females)
Substituting for M = F + 240 into the 1st equation,
F + (F + 240) = 2500
2F = 2500 - 240
2F = 2260
F = 1130
M = F + 240
M = 1370