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Simplifying 16 + -4x = -2x + 21 Reorder the terms: 16 + -4x = 21 + -2x Solving 16 + -4x = 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. 16 + -4x + 2x = 21 + -2x + 2x Combine like terms: -4x + 2x = -2x 16 + -2x = 21 + -2x + 2x Combine like terms: -2x + 2x = 0 16 + -2x = 21 + 0 16 + -2x = 21 Add '-16' to each side of the equation. 16 + -16 + -2x = 21 + -16 Combine like terms: 16 + -16 = 0 0 + -2x = 21 + -16 -2x = 21 + -16 Combine like terms: 21 + -16 = 5 -2x = 5 Divide each side by '-2'. x = -2.5 Simplifying x = -2.5
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