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Simplifying -4x + 21 = 7x + -15 Reorder the terms: 21 + -4x = 7x + -15 Reorder the terms: 21 + -4x = -15 + 7x Solving 21 + -4x = -15 + 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. 21 + -4x + -7x = -15 + 7x + -7x Combine like terms: -4x + -7x = -11x 21 + -11x = -15 + 7x + -7x Combine like terms: 7x + -7x = 0 21 + -11x = -15 + 0 21 + -11x = -15 Add '-21' to each side of the equation. 21 + -21 + -11x = -15 + -21 Combine like terms: 21 + -21 = 0 0 + -11x = -15 + -21 -11x = -15 + -21 Combine like terms: -15 + -21 = -36 -11x = -36 Divide each side by '-11'. x = 3.272727273 Simplifying x = 3.272727273
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