P/4+13=21 - solution

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Solution for P/4+13=21 equation:

P in (-oo:+oo)

P/4+13 = 21 // - 21

P/4-21+13 = 0

1/4*P-8 = 0 // + 8

1/4*P = 8 // : 1/4

P = 8/1/4

P = 32

P = 32

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