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Simplifying 142 = 2x + x + (x + 30) Reorder the terms: 142 = 2x + x + (30 + x) Remove parenthesis around (30 + x) 142 = 2x + x + 30 + x Reorder the terms: 142 = 30 + 2x + x + x Combine like terms: 2x + x = 3x 142 = 30 + 3x + x Combine like terms: 3x + x = 4x 142 = 30 + 4x Solving 142 = 30 + 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. 142 + -4x = 30 + 4x + -4x Combine like terms: 4x + -4x = 0 142 + -4x = 30 + 0 142 + -4x = 30 Add '-142' to each side of the equation. 142 + -142 + -4x = 30 + -142 Combine like terms: 142 + -142 = 0 0 + -4x = 30 + -142 -4x = 30 + -142 Combine like terms: 30 + -142 = -112 -4x = -112 Divide each side by '-4'. x = 28 Simplifying x = 28
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