Found this. Hope it helps.
https://www.algebra.com/algebra/homework/word/coins/Word_Problems_With_Coins.faq.question.1059726.html
Answer:Gabrielle is 2*Mikhail:
G = 2M We will use this value for G next
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G+M = 45 Now in this equation substitute for G, like this:
2M+M = 45
3M = 45 Divide both sides by 3
M = 15 This is Mikhail, and the problem says that:
G = 2(15) = 30
Gabrielle is 30 and Mikhail is 15, and 15+30 = 45 just like the problem says
Step-by-step explanation:
The answer will be in the picture