1/10(9+3)=1/4(2-a)

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Solution for 1/10(9+3)=1/4(2-a) equation: 


a in (-oo:+oo)

(1/10)*(3+9) = (1/4)*(2-a) // - (1/4)*(2-a)

(1/10)*(3+9)-((1/4)*(2-a)) = 0

(-1/4)*(2-a)+(1/10)*(3+9) = 0

6/5-1/4*(2-a) = 0

(-1/4*5*(2-a))/5+6/5 = 0

6-1/4*5*(2-a) = 0

5/4*a+7/2 = 0

(5/4*a+7/2)/5 = 0

(5/4*a+7/2)/5 = 0 // * 5

5/4*a+7/2 = 0

5/4*a+7/2 = 0 // - 7/2

5/4*a = -7/2 // : 5/4

a = -7/2/5/4

a = -14/5

a = -14/5

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