10 - X + 20 = 30, 14 - X + 3 = 17, 15 - X + 2 = 17, 20 - X + 10 = 30, 16 - X + 8 = 24, 11 - X + 10 = 21, 17 - X + 2 = 19, 18 - X + 6 = 24, 19 - X + 21 = 40, 13 - X + 12 = 25,

One Step Algebra Equation Lesson 1

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