Jessica is saving to purchase a new sign for her store, and she’s already saved $120. she adds $20 to the savings account each time the store sells 100 books. create and graph the equation that models the amount jessica is saving, s, in terms of the number of units of 100 books, x.

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

e

step-by-step explanation:

an equation by definition has to have two or more variables (x and 2 in this case)

hreryryrranswer:

step-by-step explanation:

-2/