-4X+13=21

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Solution for -4X+13=21 equation: 


Simplifying
-4X + 13 = 21

Reorder the terms:
13 + -4X = 21

Solving
13 + -4X = 21

Solving for variable 'X'.

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

Add '-13' to each side of the equation.
13 + -13 + -4X = 21 + -13

Combine like terms: 13 + -13 = 0
0 + -4X = 21 + -13
-4X = 21 + -13

Combine like terms: 21 + -13 = 8
-4X = 8

Divide each side by '-4'.
X = -2

Simplifying
X = -2

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