What math strategy do you use to answer judy and Ramey together have 42 stuffed animals Judy has 12 fewer animals than Ramey how many stuffed animals does each have?

Figure out every possible addition combination to equal 42 and then choose the answer with a difference of 12 between the two numbers. 41+1, 40+2, 39+3, etc. 29+17 has a differemce of 12, thus Ramey has 29 stuffed animals and Judy has 17.