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Simplifying 100 + -7x = 40 + 12x Solving 100 + -7x = 40 + 12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12x' to each side of the equation. 100 + -7x + -12x = 40 + 12x + -12x Combine like terms: -7x + -12x = -19x 100 + -19x = 40 + 12x + -12x Combine like terms: 12x + -12x = 0 100 + -19x = 40 + 0 100 + -19x = 40 Add '-100' to each side of the equation. 100 + -100 + -19x = 40 + -100 Combine like terms: 100 + -100 = 0 0 + -19x = 40 + -100 -19x = 40 + -100 Combine like terms: 40 + -100 = -60 -19x = -60 Divide each side by '-19'. x = 3.157894737 Simplifying x = 3.157894737
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