-6-3+2x+4=21

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Solution for -6-3+2x+4=21 equation: 


Simplifying
-6 + -3 + 2x + 4 = 21

Reorder the terms:
-6 + -3 + 4 + 2x = 21

Combine like terms: -6 + -3 = -9
-9 + 4 + 2x = 21

Combine like terms: -9 + 4 = -5
-5 + 2x = 21

Solving
-5 + 2x = 21

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 2x = 21 + 5

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

Combine like terms: 21 + 5 = 26
2x = 26

Divide each side by '2'.
x = 13

Simplifying
x = 13

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