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Simplifying (0.45x)(2) = 3x + 4.2 Remove parenthesis around (0.45x) 0.45x(2) = 3x + 4.2 Reorder the terms for easier multiplication: 0.45 * 2x = 3x + 4.2 Multiply 0.45 * 2 0.9x = 3x + 4.2 Reorder the terms: 0.9x = 4.2 + 3x Solving 0.9x = 4.2 + 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. 0.9x + -3x = 4.2 + 3x + -3x Combine like terms: 0.9x + -3x = -2.1x -2.1x = 4.2 + 3x + -3x Combine like terms: 3x + -3x = 0 -2.1x = 4.2 + 0 -2.1x = 4.2 Divide each side by '-2.1'. x = -2 Simplifying x = -2
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