1/2x-1/9x=21

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Solution for 1/2x-1/9x=21 equation: 


x in (-oo:+oo)

(1/2)*x-((1/9)*x) = 21 // - 21

(1/2)*x-((1/9)*x)-21 = 0

(1/2)*x+(-1/9)*x-21 = 0

7/18*x-21 = 0 // + 21

7/18*x = 21 // : 7/18

x = 21/7/18

x = 54

x = 54

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