21-2x/4=4

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Solution for 21-2x/4=4 equation: 


x in (-oo:+oo)

21-((2*x)/4) = 4 // - 4

21-((2*x)/4)-4 = 0

(-1/2)*x-4+21 = 0

17-1/2*x = 0 // - 17

-1/2*x = -17 // : -1/2

x = -17/(-1/2)

x = 34

x = 34

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