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(24-2a)×
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24-2a=10,
24-2a+2a=10+2a,
10+2a=24,
10+2a-10=24-10,
2a=14,
2a÷2=14÷2,
a=7;
所以當(dāng)a=7時,式子(24-2a)×
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(2)(24-2a)×
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24-2a=0,
24-2a+2a=0+2a,
2a=24,
2a÷2=24÷2,
a=12;
所以當(dāng)a=12時,式子(24-2a)×
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