3x-7x=3+9

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Solution for 3x-7x=3+9 equation: 


Simplifying
3x + -7x = 3 + 9

Combine like terms: 3x + -7x = -4x
-4x = 3 + 9

Combine like terms: 3 + 9 = 12
-4x = 12

Solving
-4x = 12

Solving for variable 'x'.

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

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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