Mathematics, 20.02.2020 08:08, estherdinhllama

6-55. When Lakeesha solved the equation 3(x+1)=12 from problem 6-54,she reasoned this way: "Since 3 groups of (x+1) equals 3 groups of 4, then I know that each group of (x+1) must equal 4."

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6-55. When Lakeesha solved the equation 3(x+1)=12 from problem 6-54,she reasoned this way: "Since 3...