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kristyn is 4 yrs younger than mario.three years from now she will be two thirds as old as mario. find the present ageAsked by Missy
kristyn is 4 years younger than mario. 3 years from now, she will be two thirds as old as mario. find their present age.
Answers
Answered by
Chelle
k = Kristyn
m = Mario
k = m -4
(k + 3)= 2/3(m + 2)
Substitute the value of k in the second equation.
m - 4 + 3 = 2/3m + 4/3
m - 1 = 2/3m + 4/3
ELIMINATE FRACTION BY MULTIPLYING THE EQUATION BY 3.
3(m - 1) = 3(2/3m + 4/3)
3m - 3 = 2m + 4
3m - 2m - 3 + 3 = 2m - 2m + 4 + 3
m = 7
Now put the value of m in the first equation. Or you can subtract 4 from 7.
k = 7 - 4
k = 3
Kristyn is 3
Mario is 7
m = Mario
k = m -4
(k + 3)= 2/3(m + 2)
Substitute the value of k in the second equation.
m - 4 + 3 = 2/3m + 4/3
m - 1 = 2/3m + 4/3
ELIMINATE FRACTION BY MULTIPLYING THE EQUATION BY 3.
3(m - 1) = 3(2/3m + 4/3)
3m - 3 = 2m + 4
3m - 2m - 3 + 3 = 2m - 2m + 4 + 3
m = 7
Now put the value of m in the first equation. Or you can subtract 4 from 7.
k = 7 - 4
k = 3
Kristyn is 3
Mario is 7
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