-1/3+2/7a=-4/21

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Solution for -1/3+2/7a=-4/21 equation: 


a in (-oo:+oo)

(2/7)*a-1/3 = -4/21 // + -4/21

(2/7)*a-1/3-(-4/21) = 0

(2/7)*a-1/3+4/21 = 0

2/7*a-1/7 = 0 // + 1/7

2/7*a = 1/7 // : 2/7

a = 1/7/2/7

a = 1/2

a = 1/2

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