I will do one problem and let you do the other.
c = 3d - 27
4d + 10c = 120
4d + 10(3d - 27) = 120
4d + 30d - 270 = 120
34d = 390
d = 11.47
c = 3d - 27
c = 34.41 - 27 = 7.41
Check
4d + 10c = 120
4(11.47) + 10(7.41) = 120
45 + 74.1 = 120 (close, probably not exact due to rounding error. Even so, this shows the process.)
I hope this helps. Thanks for asking.
Solve Each Sysem Using Substitution. Check ach solution.
a = 2/5b -3
a = 2b - 18
c = 3d - 27
4d + 10c = 120
Thanks, hope someone helps
2 answers
Start paying attention in class and don't be afraid to ask the teacher a question it might sound stupid but your not the only one who dosent get it you know what i mean