5r - 9s = -76
9r + 5s = 54
can anyone help me
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.