2x+21-5x+18=0

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Solution for 2x+21-5x+18=0 equation:


Simplifying
2x + 21 + -5x + 18 = 0

Reorder the terms:
21 + 18 + 2x + -5x = 0

Combine like terms: 21 + 18 = 39
39 + 2x + -5x = 0

Combine like terms: 2x + -5x = -3x
39 + -3x = 0

Solving
39 + -3x = 0

Solving for variable 'x'.

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

Add '-39' to each side of the equation.
39 + -39 + -3x = 0 + -39

Combine like terms: 39 + -39 = 0
0 + -3x = 0 + -39
-3x = 0 + -39

Combine like terms: 0 + -39 = -39
-3x = -39

Divide each side by '-3'.
x = 13

Simplifying
x = 13

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