Question

Solve the equation: 21 − 3(x − 7) = x + 20​

Answer 1

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21 – 3 (x – 7) = x + 20

☁⇒ 21 – 3x + 21 = x + 20 ⇒ 42 – 3x = x + 20

☁⇒ 42 – 20 = x + 3x ⇒ 4x = 22

☁⇒ x = 22/4 = 11/2 = 5.1/2

☁∴ x = 5.1/2