SOLUTION: how do i solve 5r-s=5 and -4r+5s=17 get back to me asap plz

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Question 607613: how do i solve 5r-s=5 and -4r+5s=17 get back to me asap plz

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
from the 1st equation ___ 5r - 5 = s

substituting into the 2nd equation ___ -4r + 5(5r - 5) = 17 ___ -4r + 25r - 25 = 17 ___ 21r = 42

solve for r, then substitute back to find s