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Helppp please. Megan is 5 years older than Sandy. If four years ago Megan was three years less than three times Sandy's age, how old is Sandy now?
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Oct 1, 2018
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Helppp please.
Megan is 5 years older than Sandy. If four years ago Megan was three years less than three times Sandy's age, how old is Sandy now?
Mathematics
high-school
Chu
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Chu
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the solution
m = s + 5
m - 4 = (3s) - 3
(s + 5) - 4 = 3s - 3
s + 1 = 3s - 3
s = 3s - 4
-2s = -4
s = 2
m = 7
Check this:
m - 4 = 3s - 3
7 - 4 = 3(2) - 3
3 = 6 - 3
3 = 3
So Sandy is 2 and Megan is 7.
Evik James
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Oct 7, 2018
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Evik James
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