x-2x-20=12;3x-45=0;15x-45=15

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Solution for x-2x-20=12;3x-45=0;15x-45=15 equation: 



x-2x-20=123x-45=015x-45=15

We move all terms to the left:

x-2x-20-(123x-45)=0

We add all the numbers together, and all the variables

-1x-(123x-45)-20=0

We get rid of parentheses

-1x-123x+45-20=0

We add all the numbers together, and all the variables

-124x+25=0

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

-124x=-25

x=-25/-124

x=25/124

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