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Simplifying 15x + -12 = -21x + -13 Reorder the terms: -12 + 15x = -21x + -13 Reorder the terms: -12 + 15x = -13 + -21x Solving -12 + 15x = -13 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -12 + 15x + 21x = -13 + -21x + 21x Combine like terms: 15x + 21x = 36x -12 + 36x = -13 + -21x + 21x Combine like terms: -21x + 21x = 0 -12 + 36x = -13 + 0 -12 + 36x = -13 Add '12' to each side of the equation. -12 + 12 + 36x = -13 + 12 Combine like terms: -12 + 12 = 0 0 + 36x = -13 + 12 36x = -13 + 12 Combine like terms: -13 + 12 = -1 36x = -1 Divide each side by '36'. x = -0.02777777778 Simplifying x = -0.02777777778
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