12-0.3(d-15)=0.5(d-15)

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Solution for 12-0.3(d-15)=0.5(d-15) equation:


Simplifying
12 + -0.3(d + -15) = 0.5(d + -15)

Reorder the terms:
12 + -0.3(-15 + d) = 0.5(d + -15)
12 + (-15 * -0.3 + d * -0.3) = 0.5(d + -15)
12 + (4.5 + -0.3d) = 0.5(d + -15)

Combine like terms: 12 + 4.5 = 16.5
16.5 + -0.3d = 0.5(d + -15)

Reorder the terms:
16.5 + -0.3d = 0.5(-15 + d)
16.5 + -0.3d = (-15 * 0.5 + d * 0.5)
16.5 + -0.3d = (-7.5 + 0.5d)

Solving
16.5 + -0.3d = -7.5 + 0.5d

Solving for variable 'd'.

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

Add '-0.5d' to each side of the equation.
16.5 + -0.3d + -0.5d = -7.5 + 0.5d + -0.5d

Combine like terms: -0.3d + -0.5d = -0.8d
16.5 + -0.8d = -7.5 + 0.5d + -0.5d

Combine like terms: 0.5d + -0.5d = 0.0
16.5 + -0.8d = -7.5 + 0.0
16.5 + -0.8d = -7.5

Add '-16.5' to each side of the equation.
16.5 + -16.5 + -0.8d = -7.5 + -16.5

Combine like terms: 16.5 + -16.5 = 0.0
0.0 + -0.8d = -7.5 + -16.5
-0.8d = -7.5 + -16.5

Combine like terms: -7.5 + -16.5 = -24
-0.8d = -24

Divide each side by '-0.8'.
d = 30

Simplifying
d = 30

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