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Simplifying (3x + 4) + (4x + 21) = 180 Reorder the terms: (4 + 3x) + (4x + 21) = 180 Remove parenthesis around (4 + 3x) 4 + 3x + (4x + 21) = 180 Reorder the terms: 4 + 3x + (21 + 4x) = 180 Remove parenthesis around (21 + 4x) 4 + 3x + 21 + 4x = 180 Reorder the terms: 4 + 21 + 3x + 4x = 180 Combine like terms: 4 + 21 = 25 25 + 3x + 4x = 180 Combine like terms: 3x + 4x = 7x 25 + 7x = 180 Solving 25 + 7x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + 7x = 180 + -25 Combine like terms: 25 + -25 = 0 0 + 7x = 180 + -25 7x = 180 + -25 Combine like terms: 180 + -25 = 155 7x = 155 Divide each side by '7'. x = 22.14285714 Simplifying x = 22.14285714
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