21-4x=-3

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Solution for 21-4x=-3 equation: 


Simplifying
21 + -4x = -3

Solving
21 + -4x = -3

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 = -3 + -21

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

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

Divide each side by '-4'.
x = 6

Simplifying
x = 6

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