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Simplifying 2x + -7 = 20 + -7x Reorder the terms: -7 + 2x = 20 + -7x Solving -7 + 2x = 20 + -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. -7 + 2x + 7x = 20 + -7x + 7x Combine like terms: 2x + 7x = 9x -7 + 9x = 20 + -7x + 7x Combine like terms: -7x + 7x = 0 -7 + 9x = 20 + 0 -7 + 9x = 20 Add '7' to each side of the equation. -7 + 7 + 9x = 20 + 7 Combine like terms: -7 + 7 = 0 0 + 9x = 20 + 7 9x = 20 + 7 Combine like terms: 20 + 7 = 27 9x = 27 Divide each side by '9'. x = 3 Simplifying x = 3
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