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3+4(1-7r)=17
We move all terms to the left:
3+4(1-7r)-(17)=0
We add all the numbers together, and all the variables
4(-7r+1)+3-17=0
We add all the numbers together, and all the variables
4(-7r+1)-14=0
We multiply parentheses
-28r+4-14=0
We add all the numbers together, and all the variables
-28r-10=0
We move all terms containing r to the left, all other terms to the right
-28r=10
r=10/-28
r=-5/14
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