Asked by Julie
Hello, I need help solving two systems of equations. I'm not sure how to solve them. They are:
7w+e=8
e+5=9
And the second one is:
7e=107-6d
7e+8d=117
Thanks!
7w+e=8
e+5=9
And the second one is:
7e=107-6d
7e+8d=117
Thanks!
Answers
Answered by
Reiny
#1,
from the 2nd,
e = 4
sub that into the first:
7w + 4 = 8
7w = 4
w = 4/7
I feel suspicious that this problem contained a typo
#2
just use substitution,
since 7e = 107 - 6d
in the 2nd:
107 - 6d + 8d = 117
2d = 10
d = 5
then 7e = 107 - 6(5)
7e = 77
e = 11
from the 2nd,
e = 4
sub that into the first:
7w + 4 = 8
7w = 4
w = 4/7
I feel suspicious that this problem contained a typo
#2
just use substitution,
since 7e = 107 - 6d
in the 2nd:
107 - 6d + 8d = 117
2d = 10
d = 5
then 7e = 107 - 6(5)
7e = 77
e = 11
Answered by
Julie
Thank you so much! Oh, and I checked and the first problem doesn't contain a typo.
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