3[7-(-2x-4)]=42x+105

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Solution for 3[7-(-2x-4)]=42x+105 equation:


Simplifying
3[7 + -1(-2x + -4)] = 42x + 105

Reorder the terms:
3[7 + -1(-4 + -2x)] = 42x + 105
3[7 + (-4 * -1 + -2x * -1)] = 42x + 105
3[7 + (4 + 2x)] = 42x + 105

Combine like terms: 7 + 4 = 11
3[11 + 2x] = 42x + 105
[11 * 3 + 2x * 3] = 42x + 105
[33 + 6x] = 42x + 105

Reorder the terms:
33 + 6x = 105 + 42x

Solving
33 + 6x = 105 + 42x

Solving for variable 'x'.

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

Add '-42x' to each side of the equation.
33 + 6x + -42x = 105 + 42x + -42x

Combine like terms: 6x + -42x = -36x
33 + -36x = 105 + 42x + -42x

Combine like terms: 42x + -42x = 0
33 + -36x = 105 + 0
33 + -36x = 105

Add '-33' to each side of the equation.
33 + -33 + -36x = 105 + -33

Combine like terms: 33 + -33 = 0
0 + -36x = 105 + -33
-36x = 105 + -33

Combine like terms: 105 + -33 = 72
-36x = 72

Divide each side by '-36'.
x = -2

Simplifying
x = -2

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