Brothers and sisters

Lenka has as many brothers as sisters. Her brothers have twice as many sisters as brothers. How many brothers and sisters are in the family?

Result

b =  3
s =  4

Solution:


b=s-1
2(b-1)=s

b-s = -1
2b-s = 2

b = 3
s = 4

Calculated by our linear equations calculator.







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To solve this example are needed these knowledge from mathematics:

Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

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