4(2.2d-1)-.8d=28

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Solution for 4(2.2d-1)-.8d=28 equation: 


Simplifying
4(2.2d + -1) + -0.8d = 28

Reorder the terms:
4(-1 + 2.2d) + -0.8d = 28
(-1 * 4 + 2.2d * 4) + -0.8d = 28
(-4 + 8.8d) + -0.8d = 28

Combine like terms: 8.8d + -0.8d = 8d
-4 + 8d = 28

Solving
-4 + 8d = 28

Solving for variable 'd'.

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

Add '4' to each side of the equation.
-4 + 4 + 8d = 28 + 4

Combine like terms: -4 + 4 = 0
0 + 8d = 28 + 4
8d = 28 + 4

Combine like terms: 28 + 4 = 32
8d = 32

Divide each side by '8'.
d = 4

Simplifying
d = 4

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