Final answer:
To find the total amount of money they saved altogether, we set up a proportion to find out how much Greg saved. Greg saved $50, and Kevin saved $100. So, the total amount they saved altogether is $230.
Step-by-step explanation:
To find out how much money the three of them saved altogether, we need to determine the amount of money Kevin and Greg saved. Since Tanya saved $16 for every $10 Greg saved, we can set up a proportion to find out how much Greg saved. Let x represent the amount of money Greg saved:
10/16 = x/80
To cross multiply, multiply the numerator of one fraction by the denominator of the other fraction:
16x = 10 * 80
Simplifying the right side of the equation gives us:
16x = 800
Divide both sides of the equation by 16 to solve for x:
x = 800/16 = 50
Therefore, Greg saved $50. Since Kevin saved twice as much as Greg, Kevin saved $50 * 2 = $100.
Therefore, the total amount of money they saved altogether is $50 + $100 + $80 = $230.
Learn more about Solving proportions and finding the total amount of money saved