21-v/-18=4 - solution

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Solution for 21-v/-18=4 equation:

v in (-oo:+oo)

21-(v/(-18)) = 4 // - 4

21-(v/(-18))-4 = 0

1/18*v+17 = 0 // - 17

1/18*v = -17 // : 1/18

v = -17/1/18

v = -306

v = -306

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