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[tex]3 \times + 7 \: and \: \times – 4y + 9[/tex]

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[tex]3 \times + 7 \: and \: \times – 4y + 9[/tex]

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[tex]3 \times + 7 \: and \: \times – 4y + 9[/tex]

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Step-by-step explanation:add : 3x + 7 and x – 4y + 9

= (3x + 7) + (x – 4y + 9)

= 3x + 7 + x – 4y + 9

= (3x + x) + (7 + 9) – 4y

= 4x + 16 – 4y