39=3x+1.2x

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Solution for 39=3x+1.2x equation:


Simplifying
39 = 3x + 1.2x

Combine like terms: 3x + 1.2x = 4.2x
39 = 4.2x

Solving
39 = 4.2x

Solving for variable 'x'.

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

Add '-4.2x' to each side of the equation.
39 + -4.2x = 4.2x + -4.2x

Combine like terms: 4.2x + -4.2x = 0.0
39 + -4.2x = 0.0

Add '-39' to each side of the equation.
39 + -39 + -4.2x = 0.0 + -39

Combine like terms: 39 + -39 = 0
0 + -4.2x = 0.0 + -39
-4.2x = 0.0 + -39

Combine like terms: 0.0 + -39 = -39
-4.2x = -39

Divide each side by '-4.2'.
x = 9.285714286

Simplifying
x = 9.285714286

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