9+(w+3)=42

Solution for 9+(w+3)=42 equation:

Simplifying
9 + (w + 3) = 42

Reorder the terms:
9 + (3 + w) = 42

Remove parenthesis around (3 + w)
9 + 3 + w = 42

Combine like terms: 9 + 3 = 12
12 + w = 42

Solving
12 + w = 42

Solving for variable 'w'.

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

Add '-12' to each side of the equation.
12 + -12 + w = 42 + -12

Combine like terms: 12 + -12 = 0
0 + w = 42 + -12
w = 42 + -12

Combine like terms: 42 + -12 = 30
w = 30

Simplifying
w = 30