87+6x+21=180

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Solution for 87+6x+21=180 equation: 



87+6x+21=180

We move all terms to the left:

87+6x+21-(180)=0

We add all the numbers together, and all the variables

6x-72=0

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

6x=72

x=72/6

x=12

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