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21) The steps Kalee used to solve the equation –4x + 9 = 2x – 12x + 51 and the properties she used to justify each step are shown. Find and identify each error. Note: There are errors in both the mathematical work and the justifications. *

21 The steps Kalee used to solve the equation 4x 9 2x 12x 51 and the properties she used to justify each step are shown Find and identify each error Note There class=