31-3x=7-7x

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


Simplifying
31 + -3x = 7 + -7x

Solving
31 + -3x = 7 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
31 + -3x + 7x = 7 + -7x + 7x

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

Combine like terms: -7x + 7x = 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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