20=a/-4 - solution

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Solution for 20=a/-4 equation:

a in (-oo:+oo)

20 = a/(-4) // - a/(-4)

20-(a/(-4)) = 0

1/4*a+20 = 0 // - 20

1/4*a = -20 // : 1/4

a = -20/1/4

a = -80

a = -80

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