13+4d=31

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Solution for 13+4d=31 equation: 


Simplifying
13 + 4d = 31

Solving
13 + 4d = 31

Solving for variable 'd'.

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

Add '-13' to each side of the equation.
13 + -13 + 4d = 31 + -13

Combine like terms: 13 + -13 = 0
0 + 4d = 31 + -13
4d = 31 + -13

Combine like terms: 31 + -13 = 18
4d = 18

Divide each side by '4'.
d = 4.5

Simplifying
d = 4.5

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