.30x+.05(8-x)=.10(-21)

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Solution for .30x+.05(8-x)=.10(-21) equation:


Simplifying
0.30x + 0.05(8 + -1x) = 0.10(-21)
0.30x + (8 * 0.05 + -1x * 0.05) = 0.10(-21)
0.30x + (0.4 + -0.05x) = 0.10(-21)

Reorder the terms:
0.4 + 0.30x + -0.05x = 0.10(-21)

Combine like terms: 0.30x + -0.05x = 0.25x
0.4 + 0.25x = 0.10(-21)

Multiply 0.10 * -21
0.4 + 0.25x = -2.1

Solving
0.4 + 0.25x = -2.1

Solving for variable 'x'.

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

Add '-0.4' to each side of the equation.
0.4 + -0.4 + 0.25x = -2.1 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + 0.25x = -2.1 + -0.4
0.25x = -2.1 + -0.4

Combine like terms: -2.1 + -0.4 = -2.5
0.25x = -2.5

Divide each side by '0.25'.
x = -10

Simplifying
x = -10

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