math
posted by johnny on .
The number of Sophomores who eat lunch in the caeteria is about threefouths the number of Freshmen. If there are 60 more Freshemen than Sophomores, how may Sophomores eat lunch in the caafeteria?

S = .75F
F  S = 60
Substitute .75F for S in second equation and solve for F. Insert that value into the first equation and solve for S. Check by inserting both values into the second equation.