-1/2a-4/7=-19/21

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Solution for -1/2a-4/7=-19/21 equation: 


a in (-oo:+oo)

(-1/2)*a-(4/7) = -19/21 // + -19/21

(-1/2)*a-(4/7)-(-19/21) = 0

(-1/2)*a-4/7+19/21 = 0

1/3-1/2*a = 0 // - 1/3

-1/2*a = -1/3 // : -1/2

a = -1/3/(-1/2)

a = 2/3

a = 2/3

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