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Simplifying 21x + 45 = 13x + -3 Reorder the terms: 45 + 21x = 13x + -3 Reorder the terms: 45 + 21x = -3 + 13x Solving 45 + 21x = -3 + 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. 45 + 21x + -13x = -3 + 13x + -13x Combine like terms: 21x + -13x = 8x 45 + 8x = -3 + 13x + -13x Combine like terms: 13x + -13x = 0 45 + 8x = -3 + 0 45 + 8x = -3 Add '-45' to each side of the equation. 45 + -45 + 8x = -3 + -45 Combine like terms: 45 + -45 = 0 0 + 8x = -3 + -45 8x = -3 + -45 Combine like terms: -3 + -45 = -48 8x = -48 Divide each side by '8'. x = -6 Simplifying x = -6
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