Problema Solution
A juice machine dispences the same amount of juice into a cup each time the machine is used. The equation x+12y=180 repesents the relationship between the numbe of cups(x) into which juice is dispenced and the gallons of juice(y) remaining in the machine. How many gallons of juice are in the machine when it is full?
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x+12y=180
by solving for y we get
y = (-x + 180)/12
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when the machine is full the number of cups x = 0
by replacing the value for x = 0 in the equation for y we get
y = (-0 + 180)/12
y = 180/12
y = 15 gallons
there are 15 gallons of juice when the machine is full.