I-x-3I=12

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Solution for I-x-3I=12 equation: 


Simplifying
I + -1x + -3I = 12

Reorder the terms:
I + -3I + -1x = 12

Combine like terms: I + -3I = -2I
-2I + -1x = 12

Solving
-2I + -1x = 12

Solving for variable 'I'.

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

Add 'x' to each side of the equation.
-2I + -1x + x = 12 + x

Combine like terms: -1x + x = 0
-2I + 0 = 12 + x
-2I = 12 + x

Divide each side by '-2'.
I = -6 + -0.5x

Simplifying
I = -6 + -0.5x

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