-1.6r+5=-7.8.

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Solution for -1.6r+5=-7.8. equation: 



-1.6r+5=-7.8.

We move all terms to the left:

-1.6r+5-(-7.8.)=0

We add all the numbers together, and all the variables

-1.6r+5-0=0

We add all the numbers together, and all the variables

-1.6r+5=0

We move all terms containing r to the left, all other terms to the right

-1.6r=-5

r=-5/-1.6

r=3+0.2/1.6

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