3d+1=13

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Solution for 3d+1=13 equation: 


Simplifying
3d + 1 = 13

Reorder the terms:
1 + 3d = 13

Solving
1 + 3d = 13

Solving for variable 'd'.

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

Add '-1' to each side of the equation.
1 + -1 + 3d = 13 + -1

Combine like terms: 1 + -1 = 0
0 + 3d = 13 + -1
3d = 13 + -1

Combine like terms: 13 + -1 = 12
3d = 12

Divide each side by '3'.
d = 4

Simplifying
d = 4

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