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Mathematics, 17.11.2020 17:10 samsamisam4951

Andrea does not understand why if x is a solution to the equation 3-x=4 then x is also a solution to the equation 12=9-3x. Write a convincing explanation as to why this is true

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Andrea does not understand why if x is a solution to the equation 3-x=4 then x is also a solution to...
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