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Elena began to solve this equation: 12x+6(4x+3) = 2(6x+4)-2 3 12x+6(4x+3)=3(2(6x+4)-2) 12x+6(4x+3)=6(6x+4)-6 12x +24x+18=36x + 24-6 When she got to the last line she

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Elena began to solve this equation: 12x+6(4x+3) = 2(6x+4)-2 3 12x+6(4x+3)=3(2(6x+4)-2) 12x+6(4x+3)=6(6x+4)-6 12x +24x+18=36x + 24-6 When she got to the last line she stopped and said the equation is true for all values o How could Elena tell?

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