19=2(4+z)-3

Solution for 19=2(4+z)-3 equation:

Simplifying
19 = 2(4 + z) + -3
19 = (4 * 2 + z * 2) + -3
19 = (8 + 2z) + -3

Reorder the terms:
19 = 8 + -3 + 2z

Combine like terms: 8 + -3 = 5
19 = 5 + 2z

Solving
19 = 5 + 2z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-2z' to each side of the equation.
19 + -2z = 5 + 2z + -2z

Combine like terms: 2z + -2z = 0
19 + -2z = 5 + 0
19 + -2z = 5

Add '-19' to each side of the equation.
19 + -19 + -2z = 5 + -19

Combine like terms: 19 + -19 = 0
0 + -2z = 5 + -19
-2z = 5 + -19

Combine like terms: 5 + -19 = -14
-2z = -14

Divide each side by '-2'.
z = 7

Simplifying
z = 7