9=-2.5x

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Solution for 9=-2.5x equation: 



9=-2.5x

We move all terms to the left:

9-(-2.5x)=0

We get rid of parentheses

2.5x+9=0

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

2.5x=-9

x=-9/2.5

x=-3+1/1.6666666666667

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