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Simplifying 7x = 9 + -3(x + -1) Reorder the terms: 7x = 9 + -3(-1 + x) 7x = 9 + (-1 * -3 + x * -3) 7x = 9 + (3 + -3x) Combine like terms: 9 + 3 = 12 7x = 12 + -3x Solving 7x = 12 + -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. 7x + 3x = 12 + -3x + 3x Combine like terms: 7x + 3x = 10x 10x = 12 + -3x + 3x Combine like terms: -3x + 3x = 0 10x = 12 + 0 10x = 12 Divide each side by '10'. x = 1.2 Simplifying x = 1.2
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