3x+7+4x=28

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Solution for 3x+7+4x=28 equation: 


Simplifying
3x + 7 + 4x = 28

Reorder the terms:
7 + 3x + 4x = 28

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

Solving
7 + 7x = 28

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 + 7x = 28 + -7

Combine like terms: 7 + -7 = 0
0 + 7x = 28 + -7
7x = 28 + -7

Combine like terms: 28 + -7 = 21
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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