1=5+15-d

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Solution for 1=5+15-d equation:


Simplifying
1 = 5 + 15 + -1d

Combine like terms: 5 + 15 = 20
1 = 20 + -1d

Solving
1 = 20 + -1d

Solving for variable 'd'.

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

Add 'd' to each side of the equation.
1 + d = 20 + -1d + d

Combine like terms: -1d + d = 0
1 + d = 20 + 0
1 + d = 20

Add '-1' to each side of the equation.
1 + -1 + d = 20 + -1

Combine like terms: 1 + -1 = 0
0 + d = 20 + -1
d = 20 + -1

Combine like terms: 20 + -1 = 19
d = 19

Simplifying
d = 19

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