4.2x-9=3.6+12

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Solution for 4.2x-9=3.6+12 equation: 


Simplifying
4.2x + -9 = 3.6 + 12

Reorder the terms:
-9 + 4.2x = 3.6 + 12

Combine like terms: 3.6 + 12 = 15.6
-9 + 4.2x = 15.6

Solving
-9 + 4.2x = 15.6

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 4.2x = 15.6 + 9

Combine like terms: -9 + 9 = 0
0 + 4.2x = 15.6 + 9
4.2x = 15.6 + 9

Combine like terms: 15.6 + 9 = 24.6
4.2x = 24.6

Divide each side by '4.2'.
x = 5.857142857

Simplifying
x = 5.857142857

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