7r+4-9r=12

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Solution for 7r+4-9r=12 equation:



7r+4-9r=12
We move all terms to the left:
7r+4-9r-(12)=0
We add all the numbers together, and all the variables
-2r-8=0
We move all terms containing r to the left, all other terms to the right
-2r=8
r=8/-2
r=-4

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