SOLUTION: Solve by using substitution method. 1.) c=3d-4 & c+d=16 2.) 3a=2b-6 & a=b-1 3.) 3n+5m=7 & m-4n=6 4.) 3y-x=-9 & 2y+5x=11 5.) 3x+2y=11 & x-2=-4y 6.) 3x+2y=550 & x=4/5y

Question 933021: Solve by using substitution method.
1.) c=3d-4 & c+d=16
2.) 3a=2b-6 & a=b-1
3.) 3n+5m=7 & m-4n=6
4.) 3y-x=-9 & 2y+5x=11
5.) 3x+2y=11 & x-2=-4y
6.) 3x+2y=550 & x=4/5y
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Solve by using substitution method.
1.) c=3d-4 & c+d=16
c is solved for, so sub for c in eqn 2.
c+d = 16
3d-4 + d = 16
4d = 20
d = -----5
c = 11
=====================
2.) 3a=2b-6 & a=b-1
a is solved for.
Do it like #1.
====================
3.) 3n+5m=7 & m-4n=6
Solve eqn 2 for m, etc.
============================
4.) 3y-x=-9 & 2y+5x=11
Solve eqn 1 for x, etc.
======================
5 & 6 are similar.
5.) 3x+2y=11 & x-2=-4y
6.) 3x+2y=550 & x=4/5y
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