r+9.8=-7.8

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Solution for r+9.8=-7.8 equation: 


Simplifying
r + 9.8 = -7.8

Reorder the terms:
9.8 + r = -7.8

Solving
9.8 + r = -7.8

Solving for variable 'r'.

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

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

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

Combine like terms: -7.8 + -9.8 = -17.6
r = -17.6

Simplifying
r = -17.6

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