If 3x + 5y = 18 and 5x + 3y = 14, then x + y is
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5
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3x+5y=18----1
5x+3y=14-----2
15x+25y=90
15x+9y=42
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16y=48
y=3
3x+5y=18
3x+15=18
3x=18-15
3x=3
x=1
x+y=3+1=4
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