2.5x+18=-x-3

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Solution for 2.5x+18=-x-3 equation: 



2.5x+18=-x-3

We move all terms to the left:

2.5x+18-(-x-3)=0

We add all the numbers together, and all the variables

2.5x-(-1x-3)+18=0

We get rid of parentheses

2.5x+1x+3+18=0

We add all the numbers together, and all the variables

3.5x+21=0

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

3.5x=-21

x=-21/3.5

x=-6

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