Read the word problem below.Antonio has a total of 55 marbles. He has 15 green marbles and 12 red marbles. The rest of the marbles are blue. How many blue marbles does he have? A student represents the number of blue marbles as the variable b and solves this problem by writing an equation. Which strategy could help check the student’s answer?
A
Check that the sum of b, 12, and 15 is 55.B
Check that the difference of 55 and b is 12.C
Check that the sum of the b, 27, and 15 is 55.D
Check that the difference of 55 and b is 15.