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\left(x-2\right)\left(x+1\right)-\left(x+3\right)x=3x+2
Variable x cannot be equal to any of the values -3,2 since division by zero is not defined. Multiply both sides of the equation by \left(x-2\right)\left(x+3\right), the least common multiple of x+3,x-2,x^{2}+x-6.
x^{2}-x-2-\left(x+3\right)x=3x+2
Use the distributive property to multiply x-2 by x+1 and combine like terms.
x^{2}-x-2-\left(x^{2}+3x\right)=3x+2
Use the distributive property to multiply x+3 by x.
x^{2}-x-2-x^{2}-3x=3x+2
To find the opposite of x^{2}+3x, find the opposite of each term.
-x-2-3x=3x+2
Combine x^{2} and -x^{2} to get 0.
-4x-2=3x+2
Combine -x and -3x to get -4x.
-4x-2-3x=2
Subtract 3x from both sides.
-7x-2=2
Combine -4x and -3x to get -7x.
-7x=2+2
Add 2 to both sides.
-7x=4
Add 2 and 2 to get 4.
x=\frac{4}{-7}
Divide both sides by -7.
x=-\frac{4}{7}
Fraction \frac{4}{-7} can be rewritten as -\frac{4}{7} by extracting the negative sign.