posted by DJ on .
very confused could someone help me with this
using the elimination method
Let's say we want to eliminate 's'
So multiply 5 to the first equation
and multiply 3 to the second equation
25r - 15s = 80
9r + 15s = 90
use the elimination method by adding those two equation -15s and 15s cancels out
34r = 170
Then r = 5