4x-3=12+9

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Solution for 4x-3=12+9 equation: 


Simplifying
4x + -3 = 12 + 9

Reorder the terms:
-3 + 4x = 12 + 9

Combine like terms: 12 + 9 = 21
-3 + 4x = 21

Solving
-3 + 4x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 4x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 4x = 21 + 3
4x = 21 + 3

Combine like terms: 21 + 3 = 24
4x = 24

Divide each side by '4'.
x = 6

Simplifying
x = 6

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