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Simplifying 2x + -3(x + 1) + 4.2(x + -3) = 0 Reorder the terms: 2x + -3(1 + x) + 4.2(x + -3) = 0 2x + (1 * -3 + x * -3) + 4.2(x + -3) = 0 2x + (-3 + -3x) + 4.2(x + -3) = 0 Reorder the terms: 2x + -3 + -3x + 4.2(-3 + x) = 0 2x + -3 + -3x + (-3 * 4.2 + x * 4.2) = 0 2x + -3 + -3x + (-12.6 + 4.2x) = 0 Reorder the terms: -3 + -12.6 + 2x + -3x + 4.2x = 0 Combine like terms: -3 + -12.6 = -15.6 -15.6 + 2x + -3x + 4.2x = 0 Combine like terms: 2x + -3x = -1x -15.6 + -1x + 4.2x = 0 Combine like terms: -1x + 4.2x = 3.2x -15.6 + 3.2x = 0 Solving -15.6 + 3.2x = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.6' to each side of the equation. -15.6 + 15.6 + 3.2x = 0 + 15.6 Combine like terms: -15.6 + 15.6 = 0.0 0.0 + 3.2x = 0 + 15.6 3.2x = 0 + 15.6 Combine like terms: 0 + 15.6 = 15.6 3.2x = 15.6 Divide each side by '3.2'. x = 4.875 Simplifying x = 4.875
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