1.25(8d-16+4d)-15-d+21=

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Solution for 1.25(8d-16+4d)-15-d+21= equation:


Simplifying
1.25(8d + -16 + 4d) + -15 + -1d + 21 = 0

Reorder the terms:
1.25(-16 + 8d + 4d) + -15 + -1d + 21 = 0

Combine like terms: 8d + 4d = 12d
1.25(-16 + 12d) + -15 + -1d + 21 = 0
(-16 * 1.25 + 12d * 1.25) + -15 + -1d + 21 = 0
(-20 + 15d) + -15 + -1d + 21 = 0

Reorder the terms:
-20 + -15 + 21 + 15d + -1d = 0

Combine like terms: -20 + -15 = -35
-35 + 21 + 15d + -1d = 0

Combine like terms: -35 + 21 = -14
-14 + 15d + -1d = 0

Combine like terms: 15d + -1d = 14d
-14 + 14d = 0

Solving
-14 + 14d = 0

Solving for variable 'd'.

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

Add '14' to each side of the equation.
-14 + 14 + 14d = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 14d = 0 + 14
14d = 0 + 14

Combine like terms: 0 + 14 = 14
14d = 14

Divide each side by '14'.
d = 1

Simplifying
d = 1

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