12r+8-10r=4

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Solution for 12r+8-10r=4 equation: 



12r+8-10r=4

We move all terms to the left:

12r+8-10r-(4)=0

We add all the numbers together, and all the variables

2r+4=0

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

2r=-4

r=-4/2

r=-2

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