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Simplifying 7(x + 3) = 13x + -12 Reorder the terms: 7(3 + x) = 13x + -12 (3 * 7 + x * 7) = 13x + -12 (21 + 7x) = 13x + -12 Reorder the terms: 21 + 7x = -12 + 13x Solving 21 + 7x = -12 + 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. 21 + 7x + -13x = -12 + 13x + -13x Combine like terms: 7x + -13x = -6x 21 + -6x = -12 + 13x + -13x Combine like terms: 13x + -13x = 0 21 + -6x = -12 + 0 21 + -6x = -12 Add '-21' to each side of the equation. 21 + -21 + -6x = -12 + -21 Combine like terms: 21 + -21 = 0 0 + -6x = -12 + -21 -6x = -12 + -21 Combine like terms: -12 + -21 = -33 -6x = -33 Divide each side by '-6'. x = 5.5 Simplifying x = 5.5
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