Number unknown

Adela thought the two-digit number, she added it to its ten times and got 407. What number does she think?

Result

a =  37

Solution:


a+10a = 407

11a = 407

a = 37

Calculated by our simple equation 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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