Joy had (3x+35) pencils.she sold 12 pencils and remained with 50pencils solve a linear equation to represent this statement and solve for x in above statement

Joy started with $(3x+35)$ pencils. She sold 12 pencils, which means 12 pencils were subtracted from her initial amount. She remained with 50 pencils.
So, the equation is:

$$(3x + 35) - 12 = 50$$

$$3x + (35 - 12) = 50$$ $$3x + 23 = 50$$

$$3x + 23 - 23 = 50 - 23$$ $$3x = 27$$

$$\frac{3x}{3} = \frac{27}{3}$$ $$x = 9$$

The value of $x$ is $\boxed{9}$.