Ms. teer spent $144 for 16 sandwiches and 12 beverages for her group. ms. pesta spent $120 for 12 sandwiches and 15 beverages for her group. each sandwich and beverage cost the same amount. write a system of equations that can be used to find the cost of each sandwich, s, and the cost of each beverage, b.

answer:      

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.