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Simplifying -21x + 89 = -13x + 57 Reorder the terms: 89 + -21x = -13x + 57 Reorder the terms: 89 + -21x = 57 + -13x Solving 89 + -21x = 57 + -13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13x' to each side of the equation. 89 + -21x + 13x = 57 + -13x + 13x Combine like terms: -21x + 13x = -8x 89 + -8x = 57 + -13x + 13x Combine like terms: -13x + 13x = 0 89 + -8x = 57 + 0 89 + -8x = 57 Add '-89' to each side of the equation. 89 + -89 + -8x = 57 + -89 Combine like terms: 89 + -89 = 0 0 + -8x = 57 + -89 -8x = 57 + -89 Combine like terms: 57 + -89 = -32 -8x = -32 Divide each side by '-8'. x = 4 Simplifying x = 4
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