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Simplifying 3(x + 4) = 7x + -28 Reorder the terms: 3(4 + x) = 7x + -28 (4 * 3 + x * 3) = 7x + -28 (12 + 3x) = 7x + -28 Reorder the terms: 12 + 3x = -28 + 7x Solving 12 + 3x = -28 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 12 + 3x + -7x = -28 + 7x + -7x Combine like terms: 3x + -7x = -4x 12 + -4x = -28 + 7x + -7x Combine like terms: 7x + -7x = 0 12 + -4x = -28 + 0 12 + -4x = -28 Add '-12' to each side of the equation. 12 + -12 + -4x = -28 + -12 Combine like terms: 12 + -12 = 0 0 + -4x = -28 + -12 -4x = -28 + -12 Combine like terms: -28 + -12 = -40 -4x = -40 Divide each side by '-4'. x = 10 Simplifying x = 10
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