3x-3.6=4.2

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Solution for 3x-3.6=4.2 equation: 


Simplifying
3x + -3.6 = 4.2

Reorder the terms:
-3.6 + 3x = 4.2

Solving
-3.6 + 3x = 4.2

Solving for variable 'x'.

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

Add '3.6' to each side of the equation.
-3.6 + 3.6 + 3x = 4.2 + 3.6

Combine like terms: -3.6 + 3.6 = 0.0
0.0 + 3x = 4.2 + 3.6
3x = 4.2 + 3.6

Combine like terms: 4.2 + 3.6 = 7.8
3x = 7.8

Divide each side by '3'.
x = 2.6

Simplifying
x = 2.6

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