10d-40=140-2d

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Solution for 10d-40=140-2d equation:


Simplifying
10d + -40 = 140 + -2d

Reorder the terms:
-40 + 10d = 140 + -2d

Solving
-40 + 10d = 140 + -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.
-40 + 10d + 2d = 140 + -2d + 2d

Combine like terms: 10d + 2d = 12d
-40 + 12d = 140 + -2d + 2d

Combine like terms: -2d + 2d = 0
-40 + 12d = 140 + 0
-40 + 12d = 140

Add '40' to each side of the equation.
-40 + 40 + 12d = 140 + 40

Combine like terms: -40 + 40 = 0
0 + 12d = 140 + 40
12d = 140 + 40

Combine like terms: 140 + 40 = 180
12d = 180

Divide each side by '12'.
d = 15

Simplifying
d = 15

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