The newberg tigers are having team shirts made. one option is to pay reggie's tees a $40 setup fee and then buy the shirts for $4 each. another option is to go to city printing, paying $20 for a setup fee and an additional $8 per shirt. the team parent in charge of the project notices that, with a certain number of shirts, the two options have the same cost. how many shirts is that?

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

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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