x+3x-3=11

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Solution for x+3x-3=11 equation: 


Simplifying
x + 3x + -3 = 11

Reorder the terms:
-3 + x + 3x = 11

Combine like terms: x + 3x = 4x
-3 + 4x = 11

Solving
-3 + 4x = 11

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 4x = 11 + 3

Combine like terms: -3 + 3 = 0
0 + 4x = 11 + 3
4x = 11 + 3

Combine like terms: 11 + 3 = 14
4x = 14

Divide each side by '4'.
x = 3.5

Simplifying
x = 3.5

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