3x+7-9=x+4

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Solution for 3x+7-9=x+4 equation:


Simplifying
3x + 7 + -9 = x + 4

Reorder the terms:
7 + -9 + 3x = x + 4

Combine like terms: 7 + -9 = -2
-2 + 3x = x + 4

Reorder the terms:
-2 + 3x = 4 + x

Solving
-2 + 3x = 4 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-2 + 3x + -1x = 4 + x + -1x

Combine like terms: 3x + -1x = 2x
-2 + 2x = 4 + x + -1x

Combine like terms: x + -1x = 0
-2 + 2x = 4 + 0
-2 + 2x = 4

Add '2' to each side of the equation.
-2 + 2 + 2x = 4 + 2

Combine like terms: -2 + 2 = 0
0 + 2x = 4 + 2
2x = 4 + 2

Combine like terms: 4 + 2 = 6
2x = 6

Divide each side by '2'.
x = 3

Simplifying
x = 3

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