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Simplifying 3 + -7x = 3(5 + -3x) 3 + -7x = (5 * 3 + -3x * 3) 3 + -7x = (15 + -9x) Solving 3 + -7x = 15 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. 3 + -7x + 9x = 15 + -9x + 9x Combine like terms: -7x + 9x = 2x 3 + 2x = 15 + -9x + 9x Combine like terms: -9x + 9x = 0 3 + 2x = 15 + 0 3 + 2x = 15 Add '-3' to each side of the equation. 3 + -3 + 2x = 15 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 15 + -3 2x = 15 + -3 Combine like terms: 15 + -3 = 12 2x = 12 Divide each side by '2'. x = 6 Simplifying x = 6
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