21-x/7=13

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Solution for 21-x/7=13 equation: 


x in (-oo:+oo)

21-(x/7) = 13 // - 13

21-(x/7)-13 = 0

8-1/7*x = 0 // - 8

-1/7*x = -8 // : -1/7

x = -8/(-1/7)

x = 56

x = 56

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