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Simplifying 21x + 12 = 2x + -3 Reorder the terms: 12 + 21x = 2x + -3 Reorder the terms: 12 + 21x = -3 + 2x Solving 12 + 21x = -3 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 12 + 21x + -2x = -3 + 2x + -2x Combine like terms: 21x + -2x = 19x 12 + 19x = -3 + 2x + -2x Combine like terms: 2x + -2x = 0 12 + 19x = -3 + 0 12 + 19x = -3 Add '-12' to each side of the equation. 12 + -12 + 19x = -3 + -12 Combine like terms: 12 + -12 = 0 0 + 19x = -3 + -12 19x = -3 + -12 Combine like terms: -3 + -12 = -15 19x = -15 Divide each side by '19'. x = -0.7894736842 Simplifying x = -0.7894736842
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