x+3x+8=128

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Solution for x+3x+8=128 equation:


Simplifying
x + 3x + 8 = 128

Reorder the terms:
8 + x + 3x = 128

Combine like terms: x + 3x = 4x
8 + 4x = 128

Solving
8 + 4x = 128

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + 4x = 128 + -8

Combine like terms: 8 + -8 = 0
0 + 4x = 128 + -8
4x = 128 + -8

Combine like terms: 128 + -8 = 120
4x = 120

Divide each side by '4'.
x = 30

Simplifying
x = 30

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