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Simplifying 21x + 7 = 3x + -8x Reorder the terms: 7 + 21x = 3x + -8x Combine like terms: 3x + -8x = -5x 7 + 21x = -5x Solving 7 + 21x = -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 + 21x + 5x = -5x + 5x Combine like terms: 21x + 5x = 26x 7 + 26x = -5x + 5x Combine like terms: -5x + 5x = 0 7 + 26x = 0 Add '-7' to each side of the equation. 7 + -7 + 26x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 26x = 0 + -7 26x = 0 + -7 Combine like terms: 0 + -7 = -7 26x = -7 Divide each side by '26'. x = -0.2692307692 Simplifying x = -0.2692307692
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