3Xr+4=2Xr-12

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Solution for 3Xr+4=2Xr-12 equation: 



3XX+4=2XX-12

We move all terms to the left:

3XX+4-(2XX-12)=0

We get rid of parentheses

3XX-2XX+12+4=0

We add all the numbers together, and all the variables

3XX-2XX+16=0

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

3XX-2XX=-16

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