Substitute a=7 in(1) 7-b=-3
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Dear,
Please recheck your question as in this question there is no value of a in the equation; 7-b=-3. Please reframe your question and post it and our brainly team will be able to help you.
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Brainly GURU,
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Answer:
where is a in expression......
according to your question...
(1)7-b=-3
b=7-3
b=4
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