Solve for x
x=4
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x^{2}+4x+3=x^{2}+19
Use the distributive property to multiply x+1 by x+3 and combine like terms.
x^{2}+4x+3-x^{2}=19
Subtract x^{2} from both sides.
4x+3=19
Combine x^{2} and -x^{2} to get 0.
4x=19-3
Subtract 3 from both sides.
4x=16
Subtract 3 from 19 to get 16.
x=\frac{16}{4}
Divide both sides by 4.
x=4
Divide 16 by 4 to get 4.
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