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Simplifying 3x + 3(x + 2) = -1 + 7x Reorder the terms: 3x + 3(2 + x) = -1 + 7x 3x + (2 * 3 + x * 3) = -1 + 7x 3x + (6 + 3x) = -1 + 7x Reorder the terms: 6 + 3x + 3x = -1 + 7x Combine like terms: 3x + 3x = 6x 6 + 6x = -1 + 7x Solving 6 + 6x = -1 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 6 + 6x + -7x = -1 + 7x + -7x Combine like terms: 6x + -7x = -1x 6 + -1x = -1 + 7x + -7x Combine like terms: 7x + -7x = 0 6 + -1x = -1 + 0 6 + -1x = -1 Add '-6' to each side of the equation. 6 + -6 + -1x = -1 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = -1 + -6 -1x = -1 + -6 Combine like terms: -1 + -6 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7
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