.25X+.05(18-X)=.10(-15)

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Solution for .25X+.05(18-X)=.10(-15) equation:


Simplifying
0.25X + 0.05(18 + -1X) = 0.10(-15)
0.25X + (18 * 0.05 + -1X * 0.05) = 0.10(-15)
0.25X + (0.9 + -0.05X) = 0.10(-15)

Reorder the terms:
0.9 + 0.25X + -0.05X = 0.10(-15)

Combine like terms: 0.25X + -0.05X = 0.2X
0.9 + 0.2X = 0.10(-15)

Multiply 0.10 * -15
0.9 + 0.2X = -1.5

Solving
0.9 + 0.2X = -1.5

Solving for variable 'X'.

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

Add '-0.9' to each side of the equation.
0.9 + -0.9 + 0.2X = -1.5 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 0.2X = -1.5 + -0.9
0.2X = -1.5 + -0.9

Combine like terms: -1.5 + -0.9 = -2.4
0.2X = -2.4

Divide each side by '0.2'.
X = -12

Simplifying
X = -12

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