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Simplifying 21 + -5x = 11 + -7x Solving 21 + -5x = 11 + -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. 21 + -5x + 7x = 11 + -7x + 7x Combine like terms: -5x + 7x = 2x 21 + 2x = 11 + -7x + 7x Combine like terms: -7x + 7x = 0 21 + 2x = 11 + 0 21 + 2x = 11 Add '-21' to each side of the equation. 21 + -21 + 2x = 11 + -21 Combine like terms: 21 + -21 = 0 0 + 2x = 11 + -21 2x = 11 + -21 Combine like terms: 11 + -21 = -10 2x = -10 Divide each side by '2'. x = -5 Simplifying x = -5
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