21x+20=-15x+12

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Solution for 21x+20=-15x+12 equation: 



21x+20=-15x+12

We move all terms to the left:

21x+20-(-15x+12)=0

We get rid of parentheses

21x+15x-12+20=0

We add all the numbers together, and all the variables

36x+8=0

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

36x=-8

x=-8/36

x=-2/9

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