7p+(-9p)-(-11p)=-18

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Solution for 7p+(-9p)-(-11p)=-18 equation: 



7p+(-9p)-(-11p)=-18

We move all terms to the left:

7p+(-9p)-(-11p)-(-18)=0

We add all the numbers together, and all the variables

7p+(-9p)-(-11p)+18=0

We get rid of parentheses

7p-9p+11p+18=0

We add all the numbers together, and all the variables

9p+18=0

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

9p=-18

p=-18/9

p=-2

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