3x+4x=8+12

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Solution for 3x+4x=8+12 equation: 


Simplifying
3x + 4x = 8 + 12

Combine like terms: 3x + 4x = 7x
7x = 8 + 12

Combine like terms: 8 + 12 = 20
7x = 20

Solving
7x = 20

Solving for variable 'x'.

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

Divide each side by '7'.
x = 2.857142857

Simplifying
x = 2.857142857

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