Question

Which equation should be used to solve this problem?

John has 15 more baseball cards than Michael. Together they have a total of 55 cards. How many cards does Michael have?

Let M = the number of baseball cards Michael has.
M - (M - 15) = 55
M + (M - 15) = 55
M + (M + 15) = 55
M - (M + 15) = 55

Answer 1

M + (M + 15) = 55

Answer 2

M+(M+15)=55