Asked by Michael R

5r - 9s = -76

9r + 5s = 54

can anyone help me
Answered by Henry
Eq1: 5r-9s = -76
Eq2: 9r+5s = 54

Multiply Eq1 by -9 and Eq2 by 5, then add:
-45r + 81s = 684
+45r + 25s = 270
Sum: 106s = 954
s = 9

In Eq1, replace s with 9:
5r - 9*9 = -76
5r = 81-76 = 5
r = 1.
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