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kx+x-3\left(x+6\right)=5k
Use the distributive property to multiply k+1 by x.
kx+x-3x-18=5k
Use the distributive property to multiply -3 by x+6.
kx-2x-18=5k
Combine x and -3x to get -2x.
kx-2x-18-5k=0
Subtract 5k from both sides.
kx-18-5k=2x
Add 2x to both sides. Anything plus zero gives itself.
kx-5k=2x+18
Add 18 to both sides.
\left(x-5\right)k=2x+18
Combine all terms containing k.
\frac{\left(x-5\right)k}{x-5}=\frac{2x+18}{x-5}
Divide both sides by x-5.
k=\frac{2x+18}{x-5}
Dividing by x-5 undoes the multiplication by x-5.
k=\frac{2\left(x+9\right)}{x-5}
Divide 18+2x by x-5.
kx+x-3\left(x+6\right)=5k
Use the distributive property to multiply k+1 by x.
kx+x-3x-18=5k
Use the distributive property to multiply -3 by x+6.
kx-2x-18=5k
Combine x and -3x to get -2x.
kx-2x=5k+18
Add 18 to both sides.
\left(k-2\right)x=5k+18
Combine all terms containing x.
\frac{\left(k-2\right)x}{k-2}=\frac{5k+18}{k-2}
Divide both sides by k-2.
x=\frac{5k+18}{k-2}
Dividing by k-2 undoes the multiplication by k-2.