Cindy needs 100 centiliters of lemon-lime soda for a punch recipe. how many liters of soda does cindy need?

Cindy needs 1 liter of soda.

Step-by-step explanation:

Conversion of unit problems can be solved as a simple rule of three problem.

The relation between a centiliter and a liter is that each centiliter has 0.01 liter. So how many liters are there in 100 centiliters?

1 cl - 0.01l

100 cl - x l

Cindy needs 1 liter of soda.

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