-1=-4a/3/7

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Solution for -1=-4a/3/7 equation: 


a in (-oo:+oo)

-1 = ((-4*a)/3)/7 // - ((-4*a)/3)/7

-(((-4*a)/3)/7)-1 = 0

(4/21)*a-1 = 0

4/21*a-1 = 0 // + 1

4/21*a = 1 // : 4/21

a = 1/4/21

a = 21/4

a = 21/4

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