81-4/7x=21

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Solution for 81-4/7x=21 equation: 


x in (-oo:+oo)

81-((4/7)*x) = 21 // - 21

81-((4/7)*x)-21 = 0

(-4/7)*x-21+81 = 0

60-4/7*x = 0 // - 60

-4/7*x = -60 // : -4/7

x = -60/(-4/7)

x = 105

x = 105

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