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Simplifying 2.7 = 3.9 + -0.4x Solving 2.7 = 3.9 + -0.4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4x' to each side of the equation. 2.7 + 0.4x = 3.9 + -0.4x + 0.4x Combine like terms: -0.4x + 0.4x = 0.0 2.7 + 0.4x = 3.9 + 0.0 2.7 + 0.4x = 3.9 Add '-2.7' to each side of the equation. 2.7 + -2.7 + 0.4x = 3.9 + -2.7 Combine like terms: 2.7 + -2.7 = 0.0 0.0 + 0.4x = 3.9 + -2.7 0.4x = 3.9 + -2.7 Combine like terms: 3.9 + -2.7 = 1.2 0.4x = 1.2 Divide each side by '0.4'. x = 3 Simplifying x = 3
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