Solve x - 6 / 21 = 6/7
2007-03-16 19:44:08 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
x- 6/21=6/7
add 6/21 to both sides
(reduce ratio by factoring out 3)
x=6/7 + 2/7
they have common denominators now so add the numerators
x=(6+2)/7= 8/7
2007-03-16 19:51:10 · answer #1 · answered by molawby 3 · 0⤊ 0⤋
x=6/21+6/7 =6/21+3*6/7=6/21+18/21=24/21
=8/7
2007-03-17 03:45:41 · answer #2 · answered by live4hoping 2 · 0⤊ 0⤋
If
x - 6 / 21 = 6/7
x = 6/7 + 6 / 21
x = 18/21 + 6 / 21
x = 24/21
x = 8/7
If
(x - 6) / 21 = 6/7
x - 6 = 6*21/7
x = 18 + 6
x = 24
2007-03-17 04:43:51 · answer #3 · answered by samarth_math 1 · 0⤊ 0⤋
If
x - 6 / 21 = 6/7
x = 6/7 + 6 / 21
x = 18/21 + 6 / 21
x = 24/21
x = 8/7
If
(x - 6) / 21 = 6/7
x - 6 = 6*21/7
x = 18 + 6
x = 24
2007-03-17 02:58:24 · answer #4 · answered by Helmut 7 · 1⤊ 0⤋
multiply both sides with 21
21X - 6 =18
so X = ( 18 + 6 ) / 21
X = 24 / 21
X = 1.143
2007-03-17 02:54:13 · answer #5 · answered by ? 3 · 0⤊ 0⤋
21x/21-6/21=6/7
(21x-6)/21=6/7
21x-6=6/7*21=18
21x=18+6=24
x=24/21=8/7
2007-03-17 03:42:30 · answer #6 · answered by Twarita 2 · 0⤊ 0⤋
x=6/7+6/21
L.C.M=21
x=(18+6)/21
x=8/7
2007-03-17 03:00:27 · answer #7 · answered by mohammed y 1 · 0⤊ 0⤋