1/2-z=-4/7 - solution

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Solution for 1/2-z=-4/7 equation:

z in (-oo:+oo)

1/2-z = -4/7 // + -4/7

1/2-z-(-4/7) = 0

1/2-z+4/7 = 0

15/14-z = 0 // - 15/14

-z = -15/14 // * -1

z = 15/14

z = 15/14

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