3x-21+x=4x-28+7

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Solution for 3x-21+x=4x-28+7 equation:


Simplifying
3x + -21 + x = 4x + -28 + 7

Reorder the terms:
-21 + 3x + x = 4x + -28 + 7

Combine like terms: 3x + x = 4x
-21 + 4x = 4x + -28 + 7

Reorder the terms:
-21 + 4x = -28 + 7 + 4x

Combine like terms: -28 + 7 = -21
-21 + 4x = -21 + 4x

Add '21' to each side of the equation.
-21 + 21 + 4x = -21 + 21 + 4x

Combine like terms: -21 + 21 = 0
0 + 4x = -21 + 21 + 4x
4x = -21 + 21 + 4x

Combine like terms: -21 + 21 = 0
4x = 0 + 4x
4x = 4x

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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