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Simplifying 7 + 5x = 15 + 3x Solving 7 + 5x = 15 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 7 + 5x + -3x = 15 + 3x + -3x Combine like terms: 5x + -3x = 2x 7 + 2x = 15 + 3x + -3x Combine like terms: 3x + -3x = 0 7 + 2x = 15 + 0 7 + 2x = 15 Add '-7' to each side of the equation. 7 + -7 + 2x = 15 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 15 + -7 2x = 15 + -7 Combine like terms: 15 + -7 = 8 2x = 8 Divide each side by '2'. x = 4 Simplifying x = 4
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