c+d=6 and c-2d=3
c = 6 - d
Substitute that value in the second equation.
6 - d - 2d = 3
-3d = - 3
d = 1
~~~~~~~~~~~~~~~~~~~~~~~~~
c + d = 6
c + 1 = 6
c = 5
The value of c that makes the equations c+d=6 and c-2d=3 true is:
A) 1
B) 2
C) 3
D) 4
E) 5
The answer is 5, but I don't know why. Please explain?
3 answers
Thank you! I'm studying for the College Board, so this really helped!
You're very welcome. Good luck with your exam! :-)
1 answer