100+8d=300

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Solution for 100+8d=300 equation: 


Simplifying
100 + 8d = 300

Solving
100 + 8d = 300

Solving for variable 'd'.

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

Add '-100' to each side of the equation.
100 + -100 + 8d = 300 + -100

Combine like terms: 100 + -100 = 0
0 + 8d = 300 + -100
8d = 300 + -100

Combine like terms: 300 + -100 = 200
8d = 200

Divide each side by '8'.
d = 25

Simplifying
d = 25

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