1.

Solve : 5(x + 1) – 2(x – 7) = 13

Answer»

5(x + 1) – 2(x – 7) = 13 

⇒ 5x + 5 – 2x + 14 = 13 (distributive law) 

⇒ (5x – 2x) + (5 + 14) = 13 (regrouping like terms) 

⇒ 3x +19 = 13 

⇒ 3x = 13 – 19 (∵ +19 transposed arid becomes)

⇒ 3x = – 6

⇒ x = -6/3 (∵ × 3 transposed and becomes ÷ 3) 

⇒ x = – 2



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