42=2(x+4)+2(x-7)

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Solution for 42=2(x+4)+2(x-7) equation:


Simplifying
42 = 2(x + 4) + 2(x + -7)

Reorder the terms:
42 = 2(4 + x) + 2(x + -7)
42 = (4 * 2 + x * 2) + 2(x + -7)
42 = (8 + 2x) + 2(x + -7)

Reorder the terms:
42 = 8 + 2x + 2(-7 + x)
42 = 8 + 2x + (-7 * 2 + x * 2)
42 = 8 + 2x + (-14 + 2x)

Reorder the terms:
42 = 8 + -14 + 2x + 2x

Combine like terms: 8 + -14 = -6
42 = -6 + 2x + 2x

Combine like terms: 2x + 2x = 4x
42 = -6 + 4x

Solving
42 = -6 + 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.
42 + -4x = -6 + 4x + -4x

Combine like terms: 4x + -4x = 0
42 + -4x = -6 + 0
42 + -4x = -6

Add '-42' to each side of the equation.
42 + -42 + -4x = -6 + -42

Combine like terms: 42 + -42 = 0
0 + -4x = -6 + -42
-4x = -6 + -42

Combine like terms: -6 + -42 = -48
-4x = -48

Divide each side by '-4'.
x = 12

Simplifying
x = 12

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