x2+5x=x2-15

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Solution for x2+5x=x2-15 equation: 



x2+5x=x2-15

We move all terms to the left:

x2+5x-(x2-15)=0

We add all the numbers together, and all the variables

-(+x^2-15)+x2+5x=0

We add all the numbers together, and all the variables

x^2-(+x^2-15)+5x=0

We get rid of parentheses

x^2-x^2+5x+15=0

We add all the numbers together, and all the variables

5x+15=0

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

5x=-15

x=-15/5

x=-3

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