0.50(4)+0.20(9.0-x)=3.00

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Solution for 0.50(4)+0.20(9.0-x)=3.00 equation: 


Simplifying
0.50(4) + 0.20(9.0 + -1x) = 3.00

Multiply 0.50 * 4
2 + 0.20(9.0 + -1x) = 3.00
2 + (9.0 * 0.20 + -1x * 0.20) = 3.00
2 + (1.8 + -0.2x) = 3.00

Combine like terms: 2 + 1.8 = 3.8
3.8 + -0.2x = 3.00

Solving
3.8 + -0.2x = 3.00

Solving for variable 'x'.

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

Add '-3.8' to each side of the equation.
3.8 + -3.8 + -0.2x = 3.00 + -3.8

Combine like terms: 3.8 + -3.8 = 0.0
0.0 + -0.2x = 3.00 + -3.8
-0.2x = 3.00 + -3.8

Combine like terms: 3.00 + -3.8 = -0.8
-0.2x = -0.8

Divide each side by '-0.2'.
x = 4

Simplifying
x = 4

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