-3+9=7.5-3k

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Solution for -3+9=7.5-3k equation: 



-3+9=7.5-3k

We move all terms to the left:

-3+9-(7.5-3k)=0

We add all the numbers together, and all the variables

-(-3k+7.5)-3+9=0

We add all the numbers together, and all the variables

-(-3k+7.5)+6=0

We get rid of parentheses

3k-7.5+6=0

We add all the numbers together, and all the variables

3k-1.5=0

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

3k=1.5

k=1.5/3

k=1/2

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