4-7r=109

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Solution for 4-7r=109 equation: 



4-7r=109

We move all terms to the left:

4-7r-(109)=0

We add all the numbers together, and all the variables

-7r-105=0

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

-7r=105

r=105/-7

r=-15

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