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Mathematics 8 Online
OpenStudy (anonymous):

3/a-6 - 1/a-2 =3

OpenStudy (anonymous):

first, subtract 1/a from 3/a

OpenStudy (anonymous):

2/a-6-2=3 then combine -6 and -2 ------>2/a-8=3

OpenStudy (anonymous):

add 8 to both sides 2/a-8+8=3+8=11

OpenStudy (anonymous):

2/a=11 multiply both sides by a 2/a*a=11*a

OpenStudy (anonymous):

2=11a

OpenStudy (anonymous):

divide both sides by 11 2/11=a or a=2/11

OpenStudy (anonymous):

is there such answer in your choices?

OpenStudy (kc_kennylau):

Well, I believe the question means 3/(a-6) - 1/(a-2) = 3

OpenStudy (kc_kennylau):

Multiply both sides by (a-6)(a-2) to get 3(a-2)-(a-6)=3(a-6)(a-2)

OpenStudy (kc_kennylau):

Expand and simplify to get 3a^2-24a+36=2a

OpenStudy (kc_kennylau):

Take the RHS to the LHS to get 3a^2-26a+36=0

OpenStudy (kc_kennylau):

Solve it by quadratic formula to get a = (13-sqrt(61))/3 or a = (13+sqrt(61))/3

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