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51.	Solve:7y/5 = y - 4
Answer» \(\frac{7y}{5}=y-4\) By cross multiplication \(\Rightarrow \frac{7y}{5}-y=-4\) \(\Rightarrow \frac{7y-5y}{5}=-4\) ⇒ 2y = - 5 × 4 ⇒ y = - 5 × 2 = - 10

51.

Solve:7y/5 = y - 4

Answer»

\(\frac{7y}{5}=y-4\)

By cross multiplication

\(\Rightarrow \frac{7y}{5}-y=-4\)

\(\Rightarrow \frac{7y-5y}{5}=-4\)

⇒ 2y = - 5 × 4

⇒ y = - 5 × 2 = - 10

Discussion

52.	Solve:3x + 2/3 = 2x + 1
Answer» 3x + \(\frac{2}{3}=\) 2x + 1 By cross multiplication \(\Rightarrow \) 3x - 2x = - \(\frac{2}{3}\) + 1 Taking LCM of 3 and 1 = 3 on RHS \(\Rightarrow \) x = \(\frac{-2\,+\,3}{3}=\frac{1}{3}\)

52.

Solve:3x + 2/3 = 2x + 1

Answer»

3x + \(\frac{2}{3}=\) 2x + 1

By cross multiplication

\(\Rightarrow \) 3x - 2x = - \(\frac{2}{3}\) + 1

Taking LCM of 3 and 1 = 3 on RHS

\(\Rightarrow \) x = \(\frac{-2\,+\,3}{3}=\frac{1}{3}\)

Discussion