d-7.8=-9.8

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Solution for d-7.8=-9.8 equation: 


Simplifying
d + -7.8 = -9.8

Reorder the terms:
-7.8 + d = -9.8

Solving
-7.8 + d = -9.8

Solving for variable 'd'.

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

Add '7.8' to each side of the equation.
-7.8 + 7.8 + d = -9.8 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + d = -9.8 + 7.8
d = -9.8 + 7.8

Combine like terms: -9.8 + 7.8 = -2
d = -2

Simplifying
d = -2

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