1/4x+1/5x=18 - solution

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Solution for 1/4x+1/5x=18 equation:

x in (-oo:+oo)

(1/4)*x+(1/5)*x = 18 // - 18

(1/4)*x+(1/5)*x-18 = 0

9/20*x-18 = 0 // + 18

9/20*x = 18 // : 9/20

x = 18/9/20

x = 40

x = 40

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