Question 203355
7r+3s=38
3r+7s=66
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21r+9s= -114 ___ why is the 114 negative?
try ___ 21r + 9s = 114


-21r-49= -462 ___ what happened to the "s"?
try ___ -21r - 49s = -462


-58= -576 ___ -40s = -348 ___ s = 8.7
S=? 9.9....?
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7r + 3 (8.7) = 38 ___ 7r + 26.1 = 38 ___ 7r = 11.9 ___ r = 1.7
R=?