21x-5/4x=20

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Solution for 21x-5/4x=20 equation: 


x in (-oo:+oo)

21*x-((5/4)*x) = 20 // - 20

21*x-((5/4)*x)-20 = 0

21*x+(-5/4)*x-20 = 0

79/4*x-20 = 0 // + 20

79/4*x = 20 // : 79/4

x = 20/79/4

x = 80/79

x = 80/79

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