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Simplifying (7x + 2) + (3x + 4) = 143 Reorder the terms: (2 + 7x) + (3x + 4) = 143 Remove parenthesis around (2 + 7x) 2 + 7x + (3x + 4) = 143 Reorder the terms: 2 + 7x + (4 + 3x) = 143 Remove parenthesis around (4 + 3x) 2 + 7x + 4 + 3x = 143 Reorder the terms: 2 + 4 + 7x + 3x = 143 Combine like terms: 2 + 4 = 6 6 + 7x + 3x = 143 Combine like terms: 7x + 3x = 10x 6 + 10x = 143 Solving 6 + 10x = 143 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 10x = 143 + -6 Combine like terms: 6 + -6 = 0 0 + 10x = 143 + -6 10x = 143 + -6 Combine like terms: 143 + -6 = 137 10x = 137 Divide each side by '10'. x = 13.7 Simplifying x = 13.7
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