SAT-LEVEL EXAMPLE
Systems word problem
Question
A café sells muffins and coffee. Three muffins and two coffees cost $18.50, and two muffins and three coffees cost $19.00. What is the cost of one coffee, in dollars?
A) $2.50B) $3.50C) $4.00D) $4.50
AI Analysis
74% ConfidenceAI confidence reflects how sure the model is about your error-type diagnosis, based on question clarity and the answer you selected.
Diagnosissystem setup error
Your WorkLet m = muffin, c = coffee3m + 2c = 18.5 and 2m + 3c = 19Subtracted equations incorrectly → c = $4.50
Correct Way3m + 2c = 18.52m + 3c = 19.0Eliminate m → c = $3.50 (choice B)Substitute back — both equations balance
That is how every mistake becomes better results.
Open full review