7.8r-8.4=-113.7

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Solution for 7.8r-8.4=-113.7 equation: 



7.8r-8.4=-113.7

We move all terms to the left:

7.8r-8.4-(-113.7)=0

We add all the numbers together, and all the variables

7.8r+105.3=0

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

7.8r=-105.3

r=-105.3/7.8

r=-13+2.0526315789474/4.1052631578947

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