3x-21+5x=-21

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Solution for 3x-21+5x=-21 equation:


Simplifying
3x + -21 + 5x = -21

Reorder the terms:
-21 + 3x + 5x = -21

Combine like terms: 3x + 5x = 8x
-21 + 8x = -21

Add '21' to each side of the equation.
-21 + 21 + 8x = -21 + 21

Combine like terms: -21 + 21 = 0
0 + 8x = -21 + 21
8x = -21 + 21

Combine like terms: -21 + 21 = 0
8x = 0

Solving
8x = 0

Solving for variable 'x'.

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

Divide each side by '8'.
x = 0

Simplifying
x = 0

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