(0.45)x(2)=3x+4.2

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Solution for (0.45)x(2)=3x+4.2 equation: 


Simplifying
(0.45) * x(2) = 3x + 4.2

Reorder the terms for easier multiplication:
0.45 * 2x = 3x + 4.2

Multiply 0.45 * 2
0.9x = 3x + 4.2

Reorder the terms:
0.9x = 4.2 + 3x

Solving
0.9x = 4.2 + 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.
0.9x + -3x = 4.2 + 3x + -3x

Combine like terms: 0.9x + -3x = -2.1x
-2.1x = 4.2 + 3x + -3x

Combine like terms: 3x + -3x = 0
-2.1x = 4.2 + 0
-2.1x = 4.2

Divide each side by '-2.1'.
x = -2

Simplifying
x = -2

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