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Simplifying 40 + -42x = 12 + -9x Solving 40 + -42x = 12 + -9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9x' to each side of the equation. 40 + -42x + 9x = 12 + -9x + 9x Combine like terms: -42x + 9x = -33x 40 + -33x = 12 + -9x + 9x Combine like terms: -9x + 9x = 0 40 + -33x = 12 + 0 40 + -33x = 12 Add '-40' to each side of the equation. 40 + -40 + -33x = 12 + -40 Combine like terms: 40 + -40 = 0 0 + -33x = 12 + -40 -33x = 12 + -40 Combine like terms: 12 + -40 = -28 -33x = -28 Divide each side by '-33'. x = 0.8484848485 Simplifying x = 0.8484848485
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