Siblings collect a 2-crowns and 5-crowns. Together have 80 coins with a total of value 310 crowns. How many saved two-crowns and how many five-crowns?

Correct answer:

n(2) =  30
n(5) =  50

Step-by-step explanation:

a+b = 80; 2a+5b = 310

a+b = 80
2•a+5•b = 310

a+b = 80
2a+5b = 310

a = 30
b = 50

Our linear equations calculator calculates it.

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