2007-01-17 08:03:31 · 3 answers · asked by Carrie E 1 in Science & Mathematics ➔ Mathematics
(4/7)k+(2/3)=(11/21)
(4/7)k=(-1/7)
k=(-1/4)
2007-01-17 08:18:23 · answer #1 · answered by Veer 3 · 0⤊ 0⤋
4/7k + 2/3 = 11/21
4k/7 + 2/3 = 11/21
multiplying through by 21,
12k + 14 = 11
12k = -13
k = -13/12
4/(7k) + 2/3 = 11/21
multiplying by 21k,
12 + 7k = 11k
4k = 12
k = 3
2007-01-17 16:23:48 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
I got the answer -1/4 also.
Subtract 2/3 from both sides of the equation.
Multiply the fractions on both sides by 7 and it gets rid of the fractional value of k.
Then you have 4K = (77/21)-(14/3)
Do the subtraction on the right side of the equation and your result is -1 (your common denominator during subtraction is 21).Then you have 4K=-1.
Divide both sides by 4.
K=(-1/4)
2007-01-21 16:01:50 · answer #3 · answered by kathyw 7 · 0⤊ 0⤋