2006-09-27 16:11:11 · 5 answers · asked by cookie 1 in Science & Mathematics ➔ Mathematics
6k+2-k=18
5k=16
k=3.2
2006-09-27 16:15:48 · answer #1 · answered by scottishchristiansen 3 · 0⤊ 0⤋
2(3k+1) - k = 18
2*3k + 2*1 - k = 18
6k + 2 - k = 18
5k + 2 = 18
5k = 18 - 2
5k = 16
k = 16/5
k = 3.2
check:
2(3k+1)-k=18
left side of equation= 2(3*3.2 + 1) - 3.2
= 2(9.6 + 1) - 3.2
= 2(10.6) - 3.2
= 21.2 - 3.2
= 18
right side of equation = 18
left side = right side
therefore k = 3.2 is the correct solution
2006-09-27 23:57:22 · answer #2 · answered by serialconfusion 2 · 0⤊ 0⤋
2(3k+1)-k=18
6k+2-k=18 (open the brackets by expanding)
5k+2=18 (6k-k=5k)
5k=16 (when you bring 2 over it will become -2. 18-2=16)
k=16/5
k= 3 1/5 (three and one over five)
got it?
its easy!
2006-09-28 02:17:46 · answer #3 · answered by Rinsha 2 · 0⤊ 0⤋
The answer is :
6k +2 - 1k =18
5k =18 - 2
5k=16
k=3,20
2006-09-27 23:21:32 · answer #4 · answered by ? 7 · 0⤊ 0⤋
I worked this in my head. The answer is 3.2.
2006-09-27 23:14:53 · answer #5 · answered by Anonymous · 0⤊ 0⤋