The half-life of a radioactive substance is 11 days. After 12 days a sample of the substance has been reduced
1 answer:
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Answer:
If a≠0, x=
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Step-by-step explanation:
If a=0 then ax+7=3 then 0+7=3 then 7=3 impossible.
If a≠0 then ax+7=3 ⇔ ax=3-7 ⇔ ax= -4 ⇔ x= -4/a.
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