12-2(-3d+2f)+7f-11d-21=

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Solution for 12-2(-3d+2f)+7f-11d-21= equation:


Simplifying
12 + -2(-3d + 2f) + 7f + -11d + -21 = 0
12 + (-3d * -2 + 2f * -2) + 7f + -11d + -21 = 0
12 + (6d + -4f) + 7f + -11d + -21 = 0

Reorder the terms:
12 + -21 + 6d + -11d + -4f + 7f = 0

Combine like terms: 12 + -21 = -9
-9 + 6d + -11d + -4f + 7f = 0

Combine like terms: 6d + -11d = -5d
-9 + -5d + -4f + 7f = 0

Combine like terms: -4f + 7f = 3f
-9 + -5d + 3f = 0

Solving
-9 + -5d + 3f = 0

Solving for variable 'd'.

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

Add '9' to each side of the equation.
-9 + -5d + 9 + 3f = 0 + 9

Reorder the terms:
-9 + 9 + -5d + 3f = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -5d + 3f = 0 + 9
-5d + 3f = 0 + 9

Combine like terms: 0 + 9 = 9
-5d + 3f = 9

Add '-3f' to each side of the equation.
-5d + 3f + -3f = 9 + -3f

Combine like terms: 3f + -3f = 0
-5d + 0 = 9 + -3f
-5d = 9 + -3f

Divide each side by '-5'.
d = -1.8 + 0.6f

Simplifying
d = -1.8 + 0.6f

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