Question

Solution of the equation 7x - 14 = 21 is * 1 point x =5 x=4 x=3 x=2​

Answer 1

Answer:

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Step-by-step explanation:

⇒ (x – 1)/(7x – 14) = (x – 3)/(7x – 26)

⇒ (x – 1)(7x – 26) = (7x -14) (x – 3)

⇒ 7x2 – 7x – 26x + 26 = 7x2 – 14x – 21x + 42

⇒ -33x + 26 = -35x + 42

⇒ 35x – 33x = 42 – 26

⇒ 2x = 16 ⇒ x = 8

Answer 2

$\sf{\blue{\dfrac{-b\:\pm\:\sqrt{b²\:-\:4ac}}{2a}}}$