4x+3x=28

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Solution for 4x+3x=28 equation: 


Simplifying
4x + 3x = 28

Combine like terms: 4x + 3x = 7x
7x = 28

Solving
7x = 28

Solving for variable 'x'.

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

Divide each side by '7'.
x = 4

Simplifying
x = 4

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