21 - 3 (x - 7) = x + 20
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Explanation:
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
I hope its helpful to u
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