31=x+3x+7

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Solution for 31=x+3x+7 equation:


Simplifying
31 = x + 3x + 7

Reorder the terms:
31 = 7 + x + 3x

Combine like terms: x + 3x = 4x
31 = 7 + 4x

Solving
31 = 7 + 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.
31 + -4x = 7 + 4x + -4x

Combine like terms: 4x + -4x = 0
31 + -4x = 7 + 0
31 + -4x = 7

Add '-31' to each side of the equation.
31 + -31 + -4x = 7 + -31

Combine like terms: 31 + -31 = 0
0 + -4x = 7 + -31
-4x = 7 + -31

Combine like terms: 7 + -31 = -24
-4x = -24

Divide each side by '-4'.
x = 6

Simplifying
x = 6

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