7+x+3x=27

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Solution for 7+x+3x=27 equation: 


Simplifying
7 + x + 3x = 27

Combine like terms: x + 3x = 4x
7 + 4x = 27

Solving
7 + 4x = 27

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 = 27 + -7

Combine like terms: 7 + -7 = 0
0 + 4x = 27 + -7
4x = 27 + -7

Combine like terms: 27 + -7 = 20
4x = 20

Divide each side by '4'.
x = 5

Simplifying
x = 5

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