28-16=3(x-9)

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Solution for 28-16=3(x-9) equation: 


Simplifying
28 + -16 = 3(x + -9)

Combine like terms: 28 + -16 = 12
12 = 3(x + -9)

Reorder the terms:
12 = 3(-9 + x)
12 = (-9 * 3 + x * 3)
12 = (-27 + 3x)

Solving
12 = -27 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
12 + -3x = -27 + 3x + -3x

Combine like terms: 3x + -3x = 0
12 + -3x = -27 + 0
12 + -3x = -27

Add '-12' to each side of the equation.
12 + -12 + -3x = -27 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = -27 + -12
-3x = -27 + -12

Combine like terms: -27 + -12 = -39
-3x = -39

Divide each side by '-3'.
x = 13

Simplifying
x = 13

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