Bunuel wrote:
Given the two equations 3r + s = 17 and r + 2s = 9, by how much does r exceed s?
A. 3
B. 4
C. 5
D. 6
E. 7
solve for these 2 eqns , you ll get r =5 & s =2
hence r-s = 5-2 = 3
Given the two equations 3r + s = 17 and r + 2s = 9, by how much does r exceed s?
A. 3
B. 4
C. 5
D. 6
E. 7
solve for these 2 eqns , you ll get r =5 & s =2
hence r-s = 5-2 = 3
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