Question 976314
Mira is five years older than Tanya. In three years, twice Mira's age will be triple Tanya's age. How old is Mira now? 
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Equations:
m = t + 5
2(m+3) = 3(t+3)
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Substitute for "m" and solve for "t":
2(t+8) = 3t+9
2t+16 = 3t+9
t = 7 yrs 
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Ans:: 
m = t+5
Mira = 7+5 = 12 yrs
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Cheers,
Stan H.
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