4x-21=12

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Solution for 4x-21=12 equation: 


Simplifying
4x + -21 = 12

Reorder the terms:
-21 + 4x = 12

Solving
-21 + 4x = 12

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 4x = 12 + 21

Combine like terms: -21 + 21 = 0
0 + 4x = 12 + 21
4x = 12 + 21

Combine like terms: 12 + 21 = 33
4x = 33

Divide each side by '4'.
x = 8.25

Simplifying
x = 8.25

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