31=7x-3x+3

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


Simplifying
31 = 7x + -3x + 3

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

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

Solving
31 = 3 + 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 = 3 + 4x + -4x

Combine like terms: 4x + -4x = 0
31 + -4x = 3 + 0
31 + -4x = 3

Add '-31' to each side of the equation.
31 + -31 + -4x = 3 + -31

Combine like terms: 31 + -31 = 0
0 + -4x = 3 + -31
-4x = 3 + -31

Combine like terms: 3 + -31 = -28
-4x = -28

Divide each side by '-4'.
x = 7

Simplifying
x = 7

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