18-15=x/-7 - solution

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Solution for 18-15=x/-7 equation:

x in (-oo:+oo)

18-15 = x/(-7) // - x/(-7)

18-(x/(-7))-15 = 0

1/7*x+3 = 0 // - 3

1/7*x = -3 // : 1/7

x = -3/1/7

x = -21

x = -21

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