x(x-3)+x(7-x)=-7

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Solution for x(x-3)+x(7-x)=-7 equation: 



x(x-3)+x(7-x)=-7

We move all terms to the left:

x(x-3)+x(7-x)-(-7)=0

We add all the numbers together, and all the variables

x(x-3)+x(-1x+7)-(-7)=0

We add all the numbers together, and all the variables

x(x-3)+x(-1x+7)+7=0

We multiply parentheses

x^2-1x^2-3x+7x+7=0

We add all the numbers together, and all the variables

4x+7=0

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

4x=-7

x=-7/4

x=-1+3/4

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