After 16 years

After 16 years will Dana be five times older as she was four years ago. After how many years will Dana celebrate her 16th birthday?

Result

x =  7

Solution:


r+16 =5(r-4)
x = 16-r

4r = 36
r+x = 16

r = 9
x = 7

Calculated by our linear equations calculator.







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To solve this verbal math problem 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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