If lainey bought a set of 20 markers for $6 how much 1 Marker cost ?

$0.30

Explanation:

In order to solve this problem, we must divide the cost of the set Lainey bought, by the amount of markers included in the set. This will tell us how much each individual marker in the set costs.

6 dollars ÷ 20 markers = 0.3

Therefore, the cost of one marker from the twenty marker set is $0.30.

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

x-3y=4

step-by-step e