6(-7+7a)=-420

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Solution for 6(-7+7a)=-420 equation: 


a in (-oo:+oo)

6*(7*a-7) = -420 // + 420

6*(7*a-7)+420 = 0

6*(7*a-7)+420 = 0

42*a+378 = 0

42*a+378 = 0

42*a+378 = 0 // - 378

42*a = -378 // : 42

a = -378/42

a = -9

a = -9

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