42=30-2(x-4)

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


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

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

Combine like terms: 30 + 8 = 38
42 = 38 + -2x

Solving
42 = 38 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
42 + 2x = 38 + -2x + 2x

Combine like terms: -2x + 2x = 0
42 + 2x = 38 + 0
42 + 2x = 38

Add '-42' to each side of the equation.
42 + -42 + 2x = 38 + -42

Combine like terms: 42 + -42 = 0
0 + 2x = 38 + -42
2x = 38 + -42

Combine like terms: 38 + -42 = -4
2x = -4

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

Simplifying
x = -2

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