.5(9-x)+.2x=4.2

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Solution for .5(9-x)+.2x=4.2 equation:


Simplifying
0.5(9 + -1x) + 0.2x = 4.2
(9 * 0.5 + -1x * 0.5) + 0.2x = 4.2
(4.5 + -0.5x) + 0.2x = 4.2

Combine like terms: -0.5x + 0.2x = -0.3x
4.5 + -0.3x = 4.2

Solving
4.5 + -0.3x = 4.2

Solving for variable 'x'.

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

Add '-4.5' to each side of the equation.
4.5 + -4.5 + -0.3x = 4.2 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + -0.3x = 4.2 + -4.5
-0.3x = 4.2 + -4.5

Combine like terms: 4.2 + -4.5 = -0.3
-0.3x = -0.3

Divide each side by '-0.3'.
x = 1

Simplifying
x = 1

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