x+3x+7=x+28

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


Simplifying
x + 3x + 7 = x + 28

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

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

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

Solving
7 + 4x = 28 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
7 + 4x + -1x = 28 + x + -1x

Combine like terms: 4x + -1x = 3x
7 + 3x = 28 + x + -1x

Combine like terms: x + -1x = 0
7 + 3x = 28 + 0
7 + 3x = 28

Add '-7' to each side of the equation.
7 + -7 + 3x = 28 + -7

Combine like terms: 7 + -7 = 0
0 + 3x = 28 + -7
3x = 28 + -7

Combine like terms: 28 + -7 = 21
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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