规定A*B=3A-2B (1)6*5=___________(2)已知a*9=6,求a

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规定A*B=3A-2B(1)6*5=___________(2)已知a*9=6,求a规定A*B=3A-2B(1)6*5=___________(2)已知a*9=6,求a规定A*B=3A-2B(1)6*

规定A*B=3A-2B (1)6*5=___________(2)已知a*9=6,求a
规定A*B=3A-2B (1)6*5=___________(2)已知a*9=6,求a

规定A*B=3A-2B (1)6*5=___________(2)已知a*9=6,求a
规定A*B=3A-2B
(1)6*5=3×6-2×5
=18-10
=8
(2)已知a*9=6,求a
3×a-2×9=6
3a-18=6
3a=24
a=8

已知A*B=3A-2B;
1、6*5则A=6,B=5,即6*5=3*6-2*5=8
2、a*9=6,则a=6/9=2/3

规定A*B=3A-2B (1)6*5=___________
6*5=3×6-2×5=8
(2)已知a*9=6,求a
3a-2×9=6
3a=24
a=8