Yuri O. answered • 02/11/21

16 years online, 464 former SAT problems drilled down

Let "F" be the number of pounds of fish sold by the market.

Let "L" be the number of pounds of lobster sold by the market.

Writing the system of equations:

F + L = 20.5

6.5F + 9.5L = 155.75

From 1st equation:

F = 20.5 - L

Substitute this expression into the 2nd equation:

6.5(20.5 - L) + 9.5L = 155.75

**L = 7.5** (pounds)

**F = 13** ( pounds)

Raymond B.

02/11/21