Aladdin had two envelopes to start. he bought three packs of
envelopes. each pack had the same number of envelopes. aladdin now has 17 envelopes.

write an equation to find the number of envelopes in each pack.
state what the variable represents.

70,000 + 6,000 + 800 + 30

step-by-step explanation:

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