SOLUTION: Please help me figure out the equation for this word problem. Marla's Grandma is currently 3 times older than Marla, but 25 years from now Marla will be half her Grandma's age. H

Question 752277: Please help me figure out the equation for this word problem.
Marla's Grandma is currently 3 times older than Marla, but 25 years from now Marla will be half her Grandma's age. How old is the Grandma right now?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Marla's Grandma is currently 3 times older than Marla,
g = 3m
:
but 25 years from now Marla will be half her Grandma's age.
m + 25 = (g+25)
Multiply both sides by 2, resulting in
2(m+25) = g + 25
2m + 50 = g + 25
2m = g + 25 - 50
2m = g - 25
Replace g with 3m
2m = 3m - 25
25 = 3m - 2m
25 = m
:
How old is the Grandma right now?
g = 3(25)
g = 75 yrs
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