3a+8b=30 b=1/4a a={ } b={ }

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3a+8b=30b=1/4aa={}b={}3a+8b=30b=1/4aa={}b={}3a+8b=30b=1/4aa={}b={}3a+8xa/4=303a+2a=30a=6b=1/4x6=1.53

3a+8b=30 b=1/4a a={ } b={ }
3a+8b=30 b=1/4a a={ } b={ }

3a+8b=30 b=1/4a a={ } b={ }
3a+8x a/4=30
3a+2a=30
a=6
b=1/4 x6=1.5

3a+8b=3a+8*1/4*a=5a=30
a=6
b=1/4*a=6/4=1.5