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Simplifying 3 = 7x + -3(4x + 7) Reorder the terms: 3 = 7x + -3(7 + 4x) 3 = 7x + (7 * -3 + 4x * -3) 3 = 7x + (-21 + -12x) Reorder the terms: 3 = -21 + 7x + -12x Combine like terms: 7x + -12x = -5x 3 = -21 + -5x Solving 3 = -21 + -5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5x' to each side of the equation. 3 + 5x = -21 + -5x + 5x Combine like terms: -5x + 5x = 0 3 + 5x = -21 + 0 3 + 5x = -21 Add '-3' to each side of the equation. 3 + -3 + 5x = -21 + -3 Combine like terms: 3 + -3 = 0 0 + 5x = -21 + -3 5x = -21 + -3 Combine like terms: -21 + -3 = -24 5x = -24 Divide each side by '5'. x = -4.8 Simplifying x = -4.8
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