3x-12=5[x-3(7-2x)-7]

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Solution for 3x-12=5[x-3(7-2x)-7] equation:


Simplifying
3x + -12 = 5[x + -3(7 + -2x) + -7]

Reorder the terms:
-12 + 3x = 5[x + -3(7 + -2x) + -7]
-12 + 3x = 5[x + (7 * -3 + -2x * -3) + -7]
-12 + 3x = 5[x + (-21 + 6x) + -7]

Reorder the terms:
-12 + 3x = 5[-21 + -7 + x + 6x]

Combine like terms: -21 + -7 = -28
-12 + 3x = 5[-28 + x + 6x]

Combine like terms: x + 6x = 7x
-12 + 3x = 5[-28 + 7x]
-12 + 3x = [-28 * 5 + 7x * 5]
-12 + 3x = [-140 + 35x]

Solving
-12 + 3x = -140 + 35x

Solving for variable 'x'.

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

Add '-35x' to each side of the equation.
-12 + 3x + -35x = -140 + 35x + -35x

Combine like terms: 3x + -35x = -32x
-12 + -32x = -140 + 35x + -35x

Combine like terms: 35x + -35x = 0
-12 + -32x = -140 + 0
-12 + -32x = -140

Add '12' to each side of the equation.
-12 + 12 + -32x = -140 + 12

Combine like terms: -12 + 12 = 0
0 + -32x = -140 + 12
-32x = -140 + 12

Combine like terms: -140 + 12 = -128
-32x = -128

Divide each side by '-32'.
x = 4

Simplifying
x = 4

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