Alyssa H. answered • 10/16/20

Tutoring Algebra 2 for math mastery!

First make sure you understand the situation.

Starting point: Tank (T) is 1/8 full,

Operation: ADDING 42 gallons

Ending point: Tank (T) is 3/4 full

Equation: 1/8 T + 42 = 3/4 T

Now you have an equation that you should know how to solve for. Get the variables on the same side by subtracting 1/8 T from both sides.

42 = 3/4 T - 1/8 T

42 = 5/8 T

42/5 = 1/8

42/5 = 8 and 2/5 gallons of water

Now solve for the entire tank or half a tank by adding however many 1/8's you need