SOLUTION: 3c+5d=17 3c+8d=5
Algebra
->
Expressions-with-variables
-> SOLUTION: 3c+5d=17 3c+8d=5
Log On
Algebra: Expressions involving variables, substitution
Section
Solvers
Solvers
Lessons
Lessons
Answers archive
Answers
Click here to see ALL problems on Expressions-with-variables
Question 96421
:
3c+5d=17
3c+8d=5
Answer by
checkley71(8403)
(
Show Source
):
You can
put this solution on YOUR website!
3c+5d=17 now subtract the other equation
-3c-8d=-5
-----------------------------------
-3d=12
d=12/-3
d=-4 answer.
3c+5*-4=17
3c-20=17
3c=17+20
3c=37
c=37/3 answer.
proof
3*37/3+8*-4=5
37-32=5
5=5