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Simplifying 168 = 5x + (2x + 7) Reorder the terms: 168 = 5x + (7 + 2x) Remove parenthesis around (7 + 2x) 168 = 5x + 7 + 2x Reorder the terms: 168 = 7 + 5x + 2x Combine like terms: 5x + 2x = 7x 168 = 7 + 7x Solving 168 = 7 + 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. 168 + -7x = 7 + 7x + -7x Combine like terms: 7x + -7x = 0 168 + -7x = 7 + 0 168 + -7x = 7 Add '-168' to each side of the equation. 168 + -168 + -7x = 7 + -168 Combine like terms: 168 + -168 = 0 0 + -7x = 7 + -168 -7x = 7 + -168 Combine like terms: 7 + -168 = -161 -7x = -161 Divide each side by '-7'. x = 23 Simplifying x = 23
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