1) x-3= 6 2) x + 2 = 9 3) x + 12 = 16 4) x + 11 = 15 5) x + 4 = 7 6) 7- x = 3 7) 2 - x =1 8) 10 - x = 6 9) 12 + x = 15 10) 16 + x = 24 11) 11 + x = 15 12) 17 + x = 20 13) 11 + x = 19 14) 10 - x = 7 15) x + 7 = 9 16) 14 + x = 16 17) 22 - x = 19 18) 14 + x = 21 19) 3 - x = 1 20) 20 - x = 15

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