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A.40%(1+80%)x=68 | B.80%(1+40%)x-x=68 |
C.x-80%(1+40%)x=68 | D.80%(1-40%)x-x=68 |
A.40%(1+80%)x=48
C.80%(1+40%)x-x=48
B.x-80%(1+40%)x=48
D.80%(1-40%)x-x=48
A.=-9
C.+2=
B.-2=
D.=+9
A.80x+100= ×80x
C.80x+300= ×80x
B.80x-100=×80x
D.80x-300=×80x
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2024-02-13
初中数学 | 选择题