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Simplifying -4x + 21 = 3x + 91 Reorder the terms: 21 + -4x = 3x + 91 Reorder the terms: 21 + -4x = 91 + 3x Solving 21 + -4x = 91 + 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 + -4x + -3x = 91 + 3x + -3x Combine like terms: -4x + -3x = -7x 21 + -7x = 91 + 3x + -3x Combine like terms: 3x + -3x = 0 21 + -7x = 91 + 0 21 + -7x = 91 Add '-21' to each side of the equation. 21 + -21 + -7x = 91 + -21 Combine like terms: 21 + -21 = 0 0 + -7x = 91 + -21 -7x = 91 + -21 Combine like terms: 91 + -21 = 70 -7x = 70 Divide each side by '-7'. x = -10 Simplifying x = -10
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