2/5a+20=a-7

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Solution for 2/5a+20=a-7 equation: 


a in (-oo:+oo)

(2/5)*a+20 = a-7 // - a-7

(2/5)*a-a+7+20 = 0

(2/5-1)*a+7+20 = 0 // - 7+20

(2/5-1)*a = -(7+20) // : 2/5-1

a = (-(7+20))/(2/5-1)

a = -((2/5-1)^-1*(7+20))

a = -((2/5-1)^-1*(7+20))

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