Verified Answer :

AL2006


You said                      x + 2/5 = 12

It might be easier to handle if we use the decimal for 2/5.

                                               x + 0.4 = 12

Subtract 0.4 from each side:  x = 11.6

That's all there is to it.  I'm sorry I can't make it
more complicated for you.

Exvited

x + \(\frac{2}{5}\) = 12

First, subtract \(\frac{2}{5}\) from both sides. / Your problem should look like: x = 12 - \(\frac{2}{5}\)
Second, simplify 12 - \(\frac{2}{5}\) to \(\frac{58}{5}\) / Your problem should look like: x = \(\frac{58}{5}\)

Answer as fraction: x = \(\frac{58}{5}\)
Answer as decimal: x = 11.6

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