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Simplifying -7 = 3(x + -7) + 2x + 1 Reorder the terms: -7 = 3(-7 + x) + 2x + 1 -7 = (-7 * 3 + x * 3) + 2x + 1 -7 = (-21 + 3x) + 2x + 1 Reorder the terms: -7 = -21 + 1 + 3x + 2x Combine like terms: -21 + 1 = -20 -7 = -20 + 3x + 2x Combine like terms: 3x + 2x = 5x -7 = -20 + 5x Solving -7 = -20 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. -7 + -5x = -20 + 5x + -5x Combine like terms: 5x + -5x = 0 -7 + -5x = -20 + 0 -7 + -5x = -20 Add '7' to each side of the equation. -7 + 7 + -5x = -20 + 7 Combine like terms: -7 + 7 = 0 0 + -5x = -20 + 7 -5x = -20 + 7 Combine like terms: -20 + 7 = -13 -5x = -13 Divide each side by '-5'. x = 2.6 Simplifying x = 2.6
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