a A={10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95}
b 12=4x+2⇒4x=10⇒x=5/2
27=2x+7⇒20=2x⇒x=10
x=5/2
C={11, 12, 27} D={10, 12, 13}
x=10
C={41.12,27} D={40, 42, 27}
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