6(5k-8)-20=99-7(3-4k)
k=73
6(5k-8)-20=99-7(3-4k) [ step by step ]
30k - 48 - 20 = 99 - 21 + 28k combine like terms
30k - 68 = 78 + 28k subtract 28k from both sides.......add 68 to both sides
2k = 146 divide both sides by 2
k = 73
