Marcos ahorro $3270 en monedas de $10,$5 y $2.si el numero de monedas de $10 excede en 20 a las de $5 y en 15 a las de $2.
cuantas monedas de 5 tiene marcos?

marcos saved $ 3270 in $ 10, $ 5 and $ 2 coins. if the number of $ 10 coins exceeds $ 5 in $ 5 and $ 2 in 15.
how many 5 coins does marcos have?

The number of $5 coins is 180

Step-by-step explanation:

Let

x ---> the number of $10 coins

y ---> the number of $5 coins

z ---> the number of $2 coins

we know that

-----> equation A

----> ----> equation B

----> ----> equation C

Solve the system by substitution

Substitute equation B and equation C in equation A

solve for x

Find the value of y

therefore

The number of $5 coins is 180

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step-by-step explanation: