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Simplifying -7x + 21 = -4 + 3x Reorder the terms: 21 + -7x = -4 + 3x Solving 21 + -7x = -4 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 21 + -7x + -3x = -4 + 3x + -3x Combine like terms: -7x + -3x = -10x 21 + -10x = -4 + 3x + -3x Combine like terms: 3x + -3x = 0 21 + -10x = -4 + 0 21 + -10x = -4 Add '-21' to each side of the equation. 21 + -21 + -10x = -4 + -21 Combine like terms: 21 + -21 = 0 0 + -10x = -4 + -21 -10x = -4 + -21 Combine like terms: -4 + -21 = -25 -10x = -25 Divide each side by '-10'. x = 2.5 Simplifying x = 2.5
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