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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 = -6x -12 + -6x = -13 + 21x + -21x Combine like terms: 21x + -21x = 0 -12 + -6x = -13 + 0 -12 + -6x = -13 Add '12' to each side of the equation. -12 + 12 + -6x = -13 + 12 Combine like terms: -12 + 12 = 0 0 + -6x = -13 + 12 -6x = -13 + 12 Combine like terms: -13 + 12 = -1 -6x = -1 Divide each side by '-6'. x = 0.1666666667 Simplifying x = 0.1666666667
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