(y+3d)-(-9+7d)=

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Solution for (y+3d)-(-9+7d)= equation:


Simplifying
(y + 3d) + -1(-9 + 7d) = 0

Reorder the terms:
(3d + y) + -1(-9 + 7d) = 0

Remove parenthesis around (3d + y)
3d + y + -1(-9 + 7d) = 0
3d + y + (-9 * -1 + 7d * -1) = 0
3d + y + (9 + -7d) = 0

Reorder the terms:
9 + 3d + -7d + y = 0

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

Solving
9 + -4d + y = 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 + -4d + -9 + y = 0 + -9

Reorder the terms:
9 + -9 + -4d + y = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -4d + y = 0 + -9
-4d + y = 0 + -9

Combine like terms: 0 + -9 = -9
-4d + y = -9

Add '-1y' to each side of the equation.
-4d + y + -1y = -9 + -1y

Combine like terms: y + -1y = 0
-4d + 0 = -9 + -1y
-4d = -9 + -1y

Divide each side by '-4'.
d = 2.25 + 0.25y

Simplifying
d = 2.25 + 0.25y

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