Question

Guys what is 21 -3 (x-7) = x +20

Answer 1

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$21 - 3(x - 7) = x + 20$

$21 - 3x + 21 = x + 20$

$= > - 3x + 42 = x + 20$

$= > - 3x - x = 20 - 42$

$= > - 4x = - 22$

$= > x = \frac{ \cancel - 22}{ \cancel - 4} = \frac{ \cancel{22}}{ \cancel{4} } = \frac{11}{2}$

$\boxed{thus, \: x = \frac{11}{2}}$

Answer 2

Step-by-step explanation:

Solution: Given:, 21 – 3(x – 7) = x + 20

⇒ 21 – 3x + 21 = x + 20

⇒ 21 – 3x + 21 – x – 20 = 0

⇒ 22 – 4x = 0

⇒ 4x = 22

⇒ 2x = 11

∴ x = 11/2