Choose the equation that models the problem. Luisa won 17 tennis matches last summer. She played a total of 26 matches. How many matches did she lose overall? Let l represent the number of games that Luisa lost.

a. l - 17 = 26

b. l + 26 = 17

c. 17l = 26

d. l + 17 = 26

I'd figure this out by taking the total of matches that Luisa played (26) and subtracting the amount of wins (17) from that.

l represents the number of games Luisa lost.

26 - 17 = l

This equation isn't in the multiple choice answers, but its reverse is.

l + 17 = 26

So your answer is d. l + 17 = 26