10(-12+)r=-420

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Solution for 10(-12+)r=-420 equation: 



10(-12+)r=-420

We move all terms to the left:

10(-12+)r-(-420)=0

We add all the numbers together, and all the variables

100r-(-420)=0

We add all the numbers together, and all the variables

100r+420=0

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

100r=-420

r=-420/100

r=-4+1/5

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