12x-31=7x+4

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Solution for 12x-31=7x+4 equation:


Simplifying
12x + -31 = 7x + 4

Reorder the terms:
-31 + 12x = 7x + 4

Reorder the terms:
-31 + 12x = 4 + 7x

Solving
-31 + 12x = 4 + 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 + 12x + -7x = 4 + 7x + -7x

Combine like terms: 12x + -7x = 5x
-31 + 5x = 4 + 7x + -7x

Combine like terms: 7x + -7x = 0
-31 + 5x = 4 + 0
-31 + 5x = 4

Add '31' to each side of the equation.
-31 + 31 + 5x = 4 + 31

Combine like terms: -31 + 31 = 0
0 + 5x = 4 + 31
5x = 4 + 31

Combine like terms: 4 + 31 = 35
5x = 35

Divide each side by '5'.
x = 7

Simplifying
x = 7

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