Answer:
12.50
Step-by-step explanation:
Each yogurt is $1.25. 1.25 x 4 = 5. so 1.25 x 10 = 12.50.
5x
I think the problem was.
3(3x - 2y) - (4x - 6y)
9x - 6y - 4x + 6y
X= -4