If x=4a y=3 and z=1, simplify : 2x+3y-x+2y 4x-y/z

Step 1: Simplify the numerator.

$2x + 3y - x + 2y$

$= (2x - x) + (3y + 2y)$

$= x + 5y$

Step 2: The expression is now

$\frac{x + 5y}{4x - \frac{y}{z}}$

Step 3: Substitute $x = 4a$, $y = 3$, $z = 1$ into the numerator.

$x + 5y = 4a + 5(3)$

$= 4a + 15$

Step 4: Substitute into the denominator.

$4x - \frac{y}{z} = 4(4a) - \frac{3}{1}$

$= 16a - 3$

Step 5: The simplified expression is

$\frac{4a + 15}{16a - 3}$

$\boxed{\dfrac{4a + 15}{16a - 3}}$