30-2(x+4)=42

Solution for 30-2(x+4)=42 equation:

Simplifying
30 + -2(x + 4) = 42

Reorder the terms:
30 + -2(4 + x) = 42
30 + (4 * -2 + x * -2) = 42
30 + (-8 + -2x) = 42

Combine like terms: 30 + -8 = 22
22 + -2x = 42

Solving
22 + -2x = 42

Solving for variable 'x'.

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

Add '-22' to each side of the equation.
22 + -22 + -2x = 42 + -22

Combine like terms: 22 + -22 = 0
0 + -2x = 42 + -22
-2x = 42 + -22

Combine like terms: 42 + -22 = 20
-2x = 20

Divide each side by '-2'.
x = -10

Simplifying
x = -10