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Simplifying 3x(6) + -3(7.5x + -2) + 4 = 21x Reorder the terms for easier multiplication: 3 * 6x + -3(7.5x + -2) + 4 = 21x Multiply 3 * 6 18x + -3(7.5x + -2) + 4 = 21x Reorder the terms: 18x + -3(-2 + 7.5x) + 4 = 21x 18x + (-2 * -3 + 7.5x * -3) + 4 = 21x 18x + (6 + -22.5x) + 4 = 21x Reorder the terms: 6 + 4 + 18x + -22.5x = 21x Combine like terms: 6 + 4 = 10 10 + 18x + -22.5x = 21x Combine like terms: 18x + -22.5x = -4.5x 10 + -4.5x = 21x Solving 10 + -4.5x = 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. 10 + -4.5x + -21x = 21x + -21x Combine like terms: -4.5x + -21x = -25.5x 10 + -25.5x = 21x + -21x Combine like terms: 21x + -21x = 0 10 + -25.5x = 0 Add '-10' to each side of the equation. 10 + -10 + -25.5x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -25.5x = 0 + -10 -25.5x = 0 + -10 Combine like terms: 0 + -10 = -10 -25.5x = -10 Divide each side by '-25.5'. x = 0.3921568627 Simplifying x = 0.3921568627
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