12+3(x-4)-18=3[5-4(5-x)]

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Solution for 12+3(x-4)-18=3[5-4(5-x)] equation:


Simplifying
12 + 3(x + -4) + -18 = 3[5 + -4(5 + -1x)]

Reorder the terms:
12 + 3(-4 + x) + -18 = 3[5 + -4(5 + -1x)]
12 + (-4 * 3 + x * 3) + -18 = 3[5 + -4(5 + -1x)]
12 + (-12 + 3x) + -18 = 3[5 + -4(5 + -1x)]

Reorder the terms:
12 + -12 + -18 + 3x = 3[5 + -4(5 + -1x)]

Combine like terms: 12 + -12 = 0
0 + -18 + 3x = 3[5 + -4(5 + -1x)]
-18 + 3x = 3[5 + -4(5 + -1x)]
-18 + 3x = 3[5 + (5 * -4 + -1x * -4)]
-18 + 3x = 3[5 + (-20 + 4x)]

Combine like terms: 5 + -20 = -15
-18 + 3x = 3[-15 + 4x]
-18 + 3x = [-15 * 3 + 4x * 3]
-18 + 3x = [-45 + 12x]

Solving
-18 + 3x = -45 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
-18 + 3x + -12x = -45 + 12x + -12x

Combine like terms: 3x + -12x = -9x
-18 + -9x = -45 + 12x + -12x

Combine like terms: 12x + -12x = 0
-18 + -9x = -45 + 0
-18 + -9x = -45

Add '18' to each side of the equation.
-18 + 18 + -9x = -45 + 18

Combine like terms: -18 + 18 = 0
0 + -9x = -45 + 18
-9x = -45 + 18

Combine like terms: -45 + 18 = -27
-9x = -27

Divide each side by '-9'.
x = 3

Simplifying
x = 3

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