.80x+.5(12-x)=.10(-69)

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Solution for .80x+.5(12-x)=.10(-69) equation:


Simplifying
0.80x + 0.5(12 + -1x) = 0.10(-69)
0.80x + (12 * 0.5 + -1x * 0.5) = 0.10(-69)
0.80x + (6 + -0.5x) = 0.10(-69)

Reorder the terms:
6 + 0.80x + -0.5x = 0.10(-69)

Combine like terms: 0.80x + -0.5x = 0.3x
6 + 0.3x = 0.10(-69)

Multiply 0.10 * -69
6 + 0.3x = -6.9

Solving
6 + 0.3x = -6.9

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 0.3x = -6.9 + -6

Combine like terms: 6 + -6 = 0
0 + 0.3x = -6.9 + -6
0.3x = -6.9 + -6

Combine like terms: -6.9 + -6 = -12.9
0.3x = -12.9

Divide each side by '0.3'.
x = -43

Simplifying
x = -43

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