A 32 year old mother realized that her age is twice the sum of her two children ages. Her son Jose is two years older than her d
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For this case we have the following situation:
The monthly cost of a gym in the city is $ 3. The initial registration is $ 25. Write a mathematical expression that models the problem.
So we have to define variables:
x: number of months
y: total cost
The mathematical expression that models the problem is: