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Simplifying 0.15x + 0.25x = (12) * 0.21x Combine like terms: 0.15x + 0.25x = 0.4x 0.4x = (12) * 0.21x Multiply 12 * 0.21 0.4x = 2.52x Solving 0.4x = 2.52x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.52x' to each side of the equation. 0.4x + -2.52x = 2.52x + -2.52x Combine like terms: 0.4x + -2.52x = -2.12x -2.12x = 2.52x + -2.52x Combine like terms: 2.52x + -2.52x = 0.00 -2.12x = 0.00 Divide each side by '-2.12'. x = 0 Simplifying x = 0
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