21/3=-9m - solution

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Solution for 21/3=-9m equation:

m in (-oo:+oo)

21/3 = -9*m // + -9*m

21/3-(-9*m) = 0

9*m+21/3 = 0

9*m+7 = 0 // - 7

9*m = -7 // : 9

m = -7/9

m = -7/9

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