Years

Susan is three years old. She will be as old as Teodor now when he is 11. How old is Teodor today?

Correct answer:

t =  7

Step-by-step explanation:


(t+x) = 11
3 + x = t

t+x = 11
t-x = 3

Row 2 - Row 1 → Row 2
t+x = 11
-2x = -8


x = -8/-2 = 4
t = 11-x = 11-4 = 7

t = 7
x = 4

Our linear equations calculator calculates it.

Try another example


Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

algebrabasic operations and conceptsUnits of physical quantitiesGrade of the word problem

Related math problems and questions: