400=3x+(1+3x)

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Solution for 400=3x+(1+3x) equation:


Simplifying
400 = 3x + (1 + 3x)

Remove parenthesis around (1 + 3x)
400 = 3x + 1 + 3x

Reorder the terms:
400 = 1 + 3x + 3x

Combine like terms: 3x + 3x = 6x
400 = 1 + 6x

Solving
400 = 1 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
400 + -6x = 1 + 6x + -6x

Combine like terms: 6x + -6x = 0
400 + -6x = 1 + 0
400 + -6x = 1

Add '-400' to each side of the equation.
400 + -400 + -6x = 1 + -400

Combine like terms: 400 + -400 = 0
0 + -6x = 1 + -400
-6x = 1 + -400

Combine like terms: 1 + -400 = -399
-6x = -399

Divide each side by '-6'.
x = 66.5

Simplifying
x = 66.5

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