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-4k+8=-3\left(k+1\right)+23
Use the distributive property to multiply 2 by -2k+4.
-4k+8=-3k-3+23
Use the distributive property to multiply -3 by k+1.
-4k+8=-3k+20
Add -3 and 23 to get 20.
-4k+8+3k=20
Add 3k to both sides.
-k+8=20
Combine -4k and 3k to get -k.
-k=20-8
Subtract 8 from both sides.
-k=12
Subtract 8 from 20 to get 12.
k=-12
Multiply both sides by -1.