(1) If 2x + 3y = 10 and 3x + 2y = 15, find the value of (x + y).
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Given,
2x+3y=10--------1
3x+2y=15--------2
Adding 1 and 2,we get
5x+5y=25
=>5(x+y)=25
Therefore,x+y=5.
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