4.2-9=3(1.2x+4)

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Solution for 4.2-9=3(1.2x+4) equation: 


Simplifying
4.2 + -9 = 3(1.2x + 4)

Combine like terms: 4.2 + -9 = -4.8
-4.8 = 3(1.2x + 4)

Reorder the terms:
-4.8 = 3(4 + 1.2x)
-4.8 = (4 * 3 + 1.2x * 3)
-4.8 = (12 + 3.6x)

Solving
-4.8 = 12 + 3.6x

Solving for variable 'x'.

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

Add '-3.6x' to each side of the equation.
-4.8 + -3.6x = 12 + 3.6x + -3.6x

Combine like terms: 3.6x + -3.6x = 0.0
-4.8 + -3.6x = 12 + 0.0
-4.8 + -3.6x = 12

Add '4.8' to each side of the equation.
-4.8 + 4.8 + -3.6x = 12 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + -3.6x = 12 + 4.8
-3.6x = 12 + 4.8

Combine like terms: 12 + 4.8 = 16.8
-3.6x = 16.8

Divide each side by '-3.6'.
x = -4.666666667

Simplifying
x = -4.666666667

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