2x+6=21-3

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


Simplifying
2x + 6 = 21 + -3

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

Combine like terms: 21 + -3 = 18
6 + 2x = 18

Solving
6 + 2x = 18

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 2x = 18 + -6

Combine like terms: 6 + -6 = 0
0 + 2x = 18 + -6
2x = 18 + -6

Combine like terms: 18 + -6 = 12
2x = 12

Divide each side by '2'.
x = 6

Simplifying
x = 6

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