400=2(x+40)+2x

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Solution for 400=2(x+40)+2x equation:


Simplifying
400 = 2(x + 40) + 2x

Reorder the terms:
400 = 2(40 + x) + 2x
400 = (40 * 2 + x * 2) + 2x
400 = (80 + 2x) + 2x

Combine like terms: 2x + 2x = 4x
400 = 80 + 4x

Solving
400 = 80 + 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.
400 + -4x = 80 + 4x + -4x

Combine like terms: 4x + -4x = 0
400 + -4x = 80 + 0
400 + -4x = 80

Add '-400' to each side of the equation.
400 + -400 + -4x = 80 + -400

Combine like terms: 400 + -400 = 0
0 + -4x = 80 + -400
-4x = 80 + -400

Combine like terms: 80 + -400 = -320
-4x = -320

Divide each side by '-4'.
x = 80

Simplifying
x = 80

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