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Apollo and Zeus are Great Danes and are both on diets. Apollo, is still a puppy and needs to gain weight. He currently weighs kg and is gaining kg per month. Zeus is an older dog who needs to lose weight. He currently weighs kg and is losing kg per month. In how many months will they weigh the same? Does your solution make sense in the context of this problem? 

Use a system of equations ( equations), where
number of months and weight in kg.

When writing the equations use slope-intercept form
(). Where is the rate of change and is the starting weight.

Equation for Apollo is .
Equation for Zeus is .

Use the equal values method to solve the system.
So . Solve for .