7=12+5x-x

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Solution for 7=12+5x-x equation:


Simplifying
7 = 12 + 5x + -1x

Combine like terms: 5x + -1x = 4x
7 = 12 + 4x

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

Combine like terms: 4x + -4x = 0
7 + -4x = 12 + 0
7 + -4x = 12

Add '-7' to each side of the equation.
7 + -7 + -4x = 12 + -7

Combine like terms: 7 + -7 = 0
0 + -4x = 12 + -7
-4x = 12 + -7

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

Divide each side by '-4'.
x = -1.25

Simplifying
x = -1.25

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