21(2-x)+12=4

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Solution for 21(2-x)+12=4 equation:


Simplifying
21(2 + -1x) + 12 = 4
(2 * 21 + -1x * 21) + 12 = 4
(42 + -21x) + 12 = 4

Reorder the terms:
42 + 12 + -21x = 4

Combine like terms: 42 + 12 = 54
54 + -21x = 4

Solving
54 + -21x = 4

Solving for variable 'x'.

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

Add '-54' to each side of the equation.
54 + -54 + -21x = 4 + -54

Combine like terms: 54 + -54 = 0
0 + -21x = 4 + -54
-21x = 4 + -54

Combine like terms: 4 + -54 = -50
-21x = -50

Divide each side by '-21'.
x = 2.380952381

Simplifying
x = 2.380952381

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