1-9r=10-8r

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Solution for 1-9r=10-8r equation:



1-9r=10-8r
We move all terms to the left:
1-9r-(10-8r)=0
We add all the numbers together, and all the variables
-9r-(-8r+10)+1=0
We get rid of parentheses
-9r+8r-10+1=0
We add all the numbers together, and all the variables
-1r-9=0
We move all terms containing r to the left, all other terms to the right
-r=9
r=9/-1
r=-9

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