Mathematics, 18.08.2020 18:01, breannamartinez9486

Solv for x for all of these 1. 3x+6=21 2. 33=7x-9 3. 28=7+x need to know now please help

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Solv for x for all of these 1. 3x+6=21 2. 33=7x-9 3. 28=7+x need to know now please help...