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The two expressions that are equivalent to 10x+2%0D%0A10%0D%0A%0D%0A+%0D%0A2%0D%0A are:
1) 5x−5x+2−4%0D%0A5%0D%0A%0D%0A−%0D%0A5%0D%0A%0D%0A+%0D%0A2%0D%0A−%0D%0A4%0D%0A
2) 9x+9+x−7%0D%0A9%0D%0A%0D%0A+%0D%0A9%0D%0A+%0D%0A%0D%0A−%0D%0A7%0D%0A