12x+4-[(3-x)-(5x+7)]=13

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Solution for 12x+4-[(3-x)-(5x+7)]=13 equation:


Simplifying
12x + 4 + -1[(3 + -1x) + -1(5x + 7)] = 13

Remove parenthesis around (3 + -1x)
12x + 4 + -1[3 + -1x + -1(5x + 7)] = 13

Reorder the terms:
12x + 4 + -1[3 + -1x + -1(7 + 5x)] = 13
12x + 4 + -1[3 + -1x + (7 * -1 + 5x * -1)] = 13
12x + 4 + -1[3 + -1x + (-7 + -5x)] = 13

Reorder the terms:
12x + 4 + -1[3 + -7 + -1x + -5x] = 13

Combine like terms: 3 + -7 = -4
12x + 4 + -1[-4 + -1x + -5x] = 13

Combine like terms: -1x + -5x = -6x
12x + 4 + -1[-4 + -6x] = 13
12x + 4 + [-4 * -1 + -6x * -1] = 13
12x + 4 + [4 + 6x] = 13

Reorder the terms:
4 + 4 + 12x + 6x = 13

Combine like terms: 4 + 4 = 8
8 + 12x + 6x = 13

Combine like terms: 12x + 6x = 18x
8 + 18x = 13

Solving
8 + 18x = 13

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + 18x = 13 + -8

Combine like terms: 8 + -8 = 0
0 + 18x = 13 + -8
18x = 13 + -8

Combine like terms: 13 + -8 = 5
18x = 5

Divide each side by '18'.
x = 0.2777777778

Simplifying
x = 0.2777777778

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