Using the substitution method how would you solve the linear system?
- 1 decade agoFavorite Answer
Number your equations first, to keep track of them.
Solve one of them for d. I'll use the first:
Put that into the second formula as d.
Solve for c.
Once you've got c, all you have to do is put it back into one of the equations and find d.
These lines cross at the point (3,8)
- John VLv 61 decade ago
from 1, d = 2c +2
so 4c + 2c + 2 = 20
6c = 18
c = 3
2*3 - d = -2
d = 8