(1-a)/(3+3a)=1/4

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


D( a )

3*a+3 = 0

3*a+3 = 0

3*a+3 = 0

3*a+3 = 0 // - 3

3*a = -3 // : 3

a = -3/3

a = -1

a in (-oo:-1) U (-1:+oo)

(1-a)/(3*a+3) = 1/4 // - 1/4

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

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

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

4*(1-a)-1*(3*a+3) = 0

1-7*a = 0

(1-7*a)/(4*(3*a+3)) = 0

(1-7*a)/(4*(3*a+3)) = 0 // * 4*(3*a+3)

1-7*a = 0

1-7*a = 0 // - 1

-7*a = -1 // : -7

a = -1/(-7)

a = 1/7

a = 1/7

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