55+785+d=1500

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Solution for 55+785+d=1500 equation: 


Simplifying
55 + 785 + d = 1500

Combine like terms: 55 + 785 = 840
840 + d = 1500

Solving
840 + d = 1500

Solving for variable 'd'.

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

Add '-840' to each side of the equation.
840 + -840 + d = 1500 + -840

Combine like terms: 840 + -840 = 0
0 + d = 1500 + -840
d = 1500 + -840

Combine like terms: 1500 + -840 = 660
d = 660

Simplifying
d = 660

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