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Simplifying 5x + -7 = 2x + -21 Reorder the terms: -7 + 5x = 2x + -21 Reorder the terms: -7 + 5x = -21 + 2x Solving -7 + 5x = -21 + 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. -7 + 5x + -2x = -21 + 2x + -2x Combine like terms: 5x + -2x = 3x -7 + 3x = -21 + 2x + -2x Combine like terms: 2x + -2x = 0 -7 + 3x = -21 + 0 -7 + 3x = -21 Add '7' to each side of the equation. -7 + 7 + 3x = -21 + 7 Combine like terms: -7 + 7 = 0 0 + 3x = -21 + 7 3x = -21 + 7 Combine like terms: -21 + 7 = -14 3x = -14 Divide each side by '3'. x = -4.666666667 Simplifying x = -4.666666667
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