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Simplifying 7 = 7x + 7(2x + 16) Reorder the terms: 7 = 7x + 7(16 + 2x) 7 = 7x + (16 * 7 + 2x * 7) 7 = 7x + (112 + 14x) Reorder the terms: 7 = 112 + 7x + 14x Combine like terms: 7x + 14x = 21x 7 = 112 + 21x Solving 7 = 112 + 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. 7 + -21x = 112 + 21x + -21x Combine like terms: 21x + -21x = 0 7 + -21x = 112 + 0 7 + -21x = 112 Add '-7' to each side of the equation. 7 + -7 + -21x = 112 + -7 Combine like terms: 7 + -7 = 0 0 + -21x = 112 + -7 -21x = 112 + -7 Combine like terms: 112 + -7 = 105 -21x = 105 Divide each side by '-21'. x = -5 Simplifying x = -5
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