30-18=4(x-4)

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Solution for 30-18=4(x-4) equation:


Simplifying
30 + -18 = 4(x + -4)

Combine like terms: 30 + -18 = 12
12 = 4(x + -4)

Reorder the terms:
12 = 4(-4 + x)
12 = (-4 * 4 + x * 4)
12 = (-16 + 4x)

Solving
12 = -16 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
12 + -4x = -16 + 4x + -4x

Combine like terms: 4x + -4x = 0
12 + -4x = -16 + 0
12 + -4x = -16

Add '-12' to each side of the equation.
12 + -12 + -4x = -16 + -12

Combine like terms: 12 + -12 = 0
0 + -4x = -16 + -12
-4x = -16 + -12

Combine like terms: -16 + -12 = -28
-4x = -28

Divide each side by '-4'.
x = 7

Simplifying
x = 7

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