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# 9.Solve the equation 7x – 9 = 16.

Here we have, 7x – 9 = 16
$$\Rightarrow$$ 7x – 9 + 9 = 16 + 9 (adding 9 to both the sides)

$$\Rightarrow$$ 7x = 25

$$\Rightarrow$$ 7x ÷ 7 = 25 ÷ 7 (dividing both the sides by 7)

$$\Rightarrow$$ x = $$\frac { 25 }{ 7 }$$

Thus, x = $$\frac { 25 }{ 7 }$$ is the required solution.

Check:

Keep x = $$\frac { 25 }{ 7 }$$ in the given solution

L.H.S=$$7x-9=7×\frac{25}{7}-9=25-9=16$$=R.H.S

Hence x = $$\frac { 25 }{ 7 }$$ is the required solution.