4x-(x+1)=12

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Solution for 4x-(x+1)=12 equation:


Simplifying
4x + -1(x + 1) = 12

Reorder the terms:
4x + -1(1 + x) = 12
4x + (1 * -1 + x * -1) = 12
4x + (-1 + -1x) = 12

Reorder the terms:
-1 + 4x + -1x = 12

Combine like terms: 4x + -1x = 3x
-1 + 3x = 12

Solving
-1 + 3x = 12

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 3x = 12 + 1

Combine like terms: -1 + 1 = 0
0 + 3x = 12 + 1
3x = 12 + 1

Combine like terms: 12 + 1 = 13
3x = 13

Divide each side by '3'.
x = 4.333333333

Simplifying
x = 4.333333333

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