3x+7+x=19

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Solution for 3x+7+x=19 equation: 


Simplifying
3x + 7 + x = 19

Reorder the terms:
7 + 3x + x = 19

Combine like terms: 3x + x = 4x
7 + 4x = 19

Solving
7 + 4x = 19

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 + 4x = 19 + -7

Combine like terms: 7 + -7 = 0
0 + 4x = 19 + -7
4x = 19 + -7

Combine like terms: 19 + -7 = 12
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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