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Simplifying 28 + -12 = 4(x + -5) Combine like terms: 28 + -12 = 16 16 = 4(x + -5) Reorder the terms: 16 = 4(-5 + x) 16 = (-5 * 4 + x * 4) 16 = (-20 + 4x) Solving 16 = -20 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 16 + -4x = -20 + 4x + -4x Combine like terms: 4x + -4x = 0 16 + -4x = -20 + 0 16 + -4x = -20 Add '-16' to each side of the equation. 16 + -16 + -4x = -20 + -16 Combine like terms: 16 + -16 = 0 0 + -4x = -20 + -16 -4x = -20 + -16 Combine like terms: -20 + -16 = -36 -4x = -36 Divide each side by '-4'. x = 9 Simplifying x = 9
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