2r+4=r+5=90

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Solution for 2r+4=r+5=90 equation: 



2r+4=r+5=90

We move all terms to the left:

2r+4-(r+5)=0

We get rid of parentheses

2r-r-5+4=0

We add all the numbers together, and all the variables

r-1=0

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

r=1

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