100-5(d+8)=7(d-3)-9d

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Solution for 100-5(d+8)=7(d-3)-9d equation:


Simplifying
100 + -5(d + 8) = 7(d + -3) + -9d

Reorder the terms:
100 + -5(8 + d) = 7(d + -3) + -9d
100 + (8 * -5 + d * -5) = 7(d + -3) + -9d
100 + (-40 + -5d) = 7(d + -3) + -9d

Combine like terms: 100 + -40 = 60
60 + -5d = 7(d + -3) + -9d

Reorder the terms:
60 + -5d = 7(-3 + d) + -9d
60 + -5d = (-3 * 7 + d * 7) + -9d
60 + -5d = (-21 + 7d) + -9d

Combine like terms: 7d + -9d = -2d
60 + -5d = -21 + -2d

Solving
60 + -5d = -21 + -2d

Solving for variable 'd'.

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

Add '2d' to each side of the equation.
60 + -5d + 2d = -21 + -2d + 2d

Combine like terms: -5d + 2d = -3d
60 + -3d = -21 + -2d + 2d

Combine like terms: -2d + 2d = 0
60 + -3d = -21 + 0
60 + -3d = -21

Add '-60' to each side of the equation.
60 + -60 + -3d = -21 + -60

Combine like terms: 60 + -60 = 0
0 + -3d = -21 + -60
-3d = -21 + -60

Combine like terms: -21 + -60 = -81
-3d = -81

Divide each side by '-3'.
d = 27

Simplifying
d = 27

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