7p^2-9p+15p+45=7p^2+21p

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Solution for 7p^2-9p+15p+45=7p^2+21p equation: 



7p^2-9p+15p+45=7p^2+21p

We move all terms to the left:

7p^2-9p+15p+45-(7p^2+21p)=0

We add all the numbers together, and all the variables

7p^2+6p-(7p^2+21p)+45=0

We get rid of parentheses

7p^2-7p^2+6p-21p+45=0

We add all the numbers together, and all the variables

-15p+45=0

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

-15p=-45

p=-45/-15

p=+3

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