Maria has $5.00 more than Joseph. Together they have $37.50. Which of these equations would you use to find the amount of money Joseph has?
A. j + (5 x j) = $37.50
B. j + ( j ÷ 5) = $37.50
C. 5 x j = $37.50 + j
D. 2 x ( j + 5) = $37.50
E. j + j +5 = $37.50
This item ... is missed by the majority of eighth-grade students in the NWEA norm group.
The Proficiency Illusion
John Cronin, et al
I'm going to guess C. would get this right.
Of course, this is a classic bar model problem in Singapore Math. Third grade level, I believe, although you don't use variables. Still, the bar model is as abstract as a letter variable, or close to.