h-(21/3)=x - solution

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Solution for h-(21/3)=x equation:

x in (-oo:+oo)

h-(21/3) = x // - x

h-x-(21/3) = 0

h-x-7 = 0

h-x-7 = 0 // - h-7

-x = -(h-7) // * -1

x = h-7

x = h-7

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