Question
What is the solution set to the equation (2)/(7-m)=(4)/(m)-(5-m)/(7-m) A) 4,7 B) 4,5 C) 1,7 D) 4
Solution
4.6
(185 Votos)
Gabriela Maria
Mestre · Tutor por 5 anos
Resposta
To solve the equation
, we can start by finding a common denominator for the fractions on the right side of the equation. The common denominator is
. Multiplying both sides of the equation by
, we get:
Expanding and simplifying, we have:
Multiplying through by
to clear the fraction, we get:
Rearranging terms, we have:
This is a quadratic equation, which can be solved using the quadratic formula or by factoring. Factoring this equation, we get:
Setting each factor equal to zero, we have:
or
Solving for
, we get:
or
However, we must check these solutions in the original equation to ensure they are not extraneous. Plugging
into the original equation, we find that it is a valid solution. Plugging
into the original equation, we find that it is not a valid solution because it makes the denominator of the first fraction equal to zero.Therefore, the solution set to the equation is
, which corresponds to option D.