# Number

Determine unknown number if you know that difference between five times and triple of number is 42.

Result

x =  21

#### Solution:

5x-3x = 42

2x = 42

x = 21

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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