solve using elimination method
2007-07-25 04:57:53 · 5 answers · asked by bee 1 in Science & Mathematics ➔ Mathematics
7c+5d=18
+ c-5d=-2
=
8c =16
c=2 d=4/5
2007-07-25 05:08:02 · answer #1 · answered by Anonymous · 0⤊ 0⤋
8c = 16 (after adding)
c = 2
14 + 5d = 18
5d = 4
d = 4 / 5
c = 2 , d = 4 / 5
2007-07-25 12:13:08 · answer #2 · answered by Como 7 · 0⤊ 0⤋
7c+5d=18
c-5d=-2
-----------
8c =16
c=2 d= 4/5
2007-07-25 12:09:19 · answer #3 · answered by xandyone 5 · 0⤊ 0⤋
(7c+5d=18
(c-5d=-2
---------------
8c = 16
c = 16 : 8
c = 2
c - 5d = -2
2 - 5d = -2
-5d = -2 - 2
d = -4/-5
d = 4/5
Answer: (2 and 4/5)
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2007-07-25 12:20:23 · answer #4 · answered by aeiou 7 · 0⤊ 0⤋
7c+5d=18
c-5d=-2
-----------------add
8c=16-----------divided by 8
c=16/8=2
7*2+5d=18
14+5d=18
5d=18-14
5d=4
d=4/5
2007-07-25 12:29:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋