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Simplifying 5x + -21 = 2x + -4 Reorder the terms: -21 + 5x = 2x + -4 Reorder the terms: -21 + 5x = -4 + 2x Solving -21 + 5x = -4 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -21 + 5x + -2x = -4 + 2x + -2x Combine like terms: 5x + -2x = 3x -21 + 3x = -4 + 2x + -2x Combine like terms: 2x + -2x = 0 -21 + 3x = -4 + 0 -21 + 3x = -4 Add '21' to each side of the equation. -21 + 21 + 3x = -4 + 21 Combine like terms: -21 + 21 = 0 0 + 3x = -4 + 21 3x = -4 + 21 Combine like terms: -4 + 21 = 17 3x = 17 Divide each side by '3'. x = 5.666666667 Simplifying x = 5.666666667
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