8-(-9)=d

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Solution for 8-(-9)=d equation:


Simplifying
8 + -1(-9) = d

Multiply -1 * -9
8 + 9 = d

Combine like terms: 8 + 9 = 17
17 = d

Solving
17 = d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
17 + -1d = d + -1d

Combine like terms: d + -1d = 0
17 + -1d = 0

Add '-17' to each side of the equation.
17 + -17 + -1d = 0 + -17

Combine like terms: 17 + -17 = 0
0 + -1d = 0 + -17
-1d = 0 + -17

Combine like terms: 0 + -17 = -17
-1d = -17

Divide each side by '-1'.
d = 17

Simplifying
d = 17

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