42=-2c/5

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Solution for 42=-2c/5 equation: 


c in (-oo:+oo)

42 = (-2*c)/5 // - (-2*c)/5

42-((-2*c)/5) = 0

(2/5)*c+42 = 0

2/5*c+42 = 0 // - 42

2/5*c = -42 // : 2/5

c = -42/2/5

c = -105

c = -105

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