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Simplifying 5x + 13 = 7x + -21 Reorder the terms: 13 + 5x = 7x + -21 Reorder the terms: 13 + 5x = -21 + 7x Solving 13 + 5x = -21 + 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. 13 + 5x + -7x = -21 + 7x + -7x Combine like terms: 5x + -7x = -2x 13 + -2x = -21 + 7x + -7x Combine like terms: 7x + -7x = 0 13 + -2x = -21 + 0 13 + -2x = -21 Add '-13' to each side of the equation. 13 + -13 + -2x = -21 + -13 Combine like terms: 13 + -13 = 0 0 + -2x = -21 + -13 -2x = -21 + -13 Combine like terms: -21 + -13 = -34 -2x = -34 Divide each side by '-2'. x = 17 Simplifying x = 17
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