2x+3+4=12

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Solution for 2x+3+4=12 equation: 


Simplifying
2x + 3 + 4 = 12

Reorder the terms:
3 + 4 + 2x = 12

Combine like terms: 3 + 4 = 7
7 + 2x = 12

Solving
7 + 2x = 12

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + 2x = 12 + -7

Combine like terms: 7 + -7 = 0
0 + 2x = 12 + -7
2x = 12 + -7

Combine like terms: 12 + -7 = 5
2x = 5

Divide each side by '2'.
x = 2.5

Simplifying
x = 2.5

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