-(1/2)x+7=21

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Solution for -(1/2)x+7=21 equation: 


x in (-oo:+oo)

7-((1/2)*x) = 21 // - 21

7-((1/2)*x)-21 = 0

(-1/2)*x-21+7 = 0

-1/2*x-14 = 0 // + 14

-1/2*x = 14 // : -1/2

x = 14/(-1/2)

x = -28

x = -28

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