10(-2+4r)=-340

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Solution for 10(-2+4r)=-340 equation: 



10(-2+4r)=-340

We move all terms to the left:

10(-2+4r)-(-340)=0

We add all the numbers together, and all the variables

10(4r-2)-(-340)=0

We add all the numbers together, and all the variables

10(4r-2)+340=0

We multiply parentheses

40r-20+340=0

We add all the numbers together, and all the variables

40r+320=0

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

40r=-320

r=-320/40

r=-8

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