7 - y - 5 = 2, 20 - y + 5 = 25, 14 - b - 6 = 8, 2 - b + 6 = 8, 12 - v - 5 = 7, 13 - v + 6= 19, 5 - 3 + y = 8, 6 - 14 + y = 20, 9 - 30 + x = 39, 4 - 23+ d = 27,

Addition and Subtraction Equation

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