3d+1=4d-7

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Solution for 3d+1=4d-7 equation:


Simplifying
3d + 1 = 4d + -7

Reorder the terms:
1 + 3d = 4d + -7

Reorder the terms:
1 + 3d = -7 + 4d

Solving
1 + 3d = -7 + 4d

Solving for variable 'd'.

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

Add '-4d' to each side of the equation.
1 + 3d + -4d = -7 + 4d + -4d

Combine like terms: 3d + -4d = -1d
1 + -1d = -7 + 4d + -4d

Combine like terms: 4d + -4d = 0
1 + -1d = -7 + 0
1 + -1d = -7

Add '-1' to each side of the equation.
1 + -1 + -1d = -7 + -1

Combine like terms: 1 + -1 = 0
0 + -1d = -7 + -1
-1d = -7 + -1

Combine like terms: -7 + -1 = -8
-1d = -8

Divide each side by '-1'.
d = 8

Simplifying
d = 8

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