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Simplifying 7 = 0.4x + -0.5x + -2 Reorder the terms: 7 = -2 + 0.4x + -0.5x Combine like terms: 0.4x + -0.5x = -0.1x 7 = -2 + -0.1x Solving 7 = -2 + -0.1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1x' to each side of the equation. 7 + 0.1x = -2 + -0.1x + 0.1x Combine like terms: -0.1x + 0.1x = 0.0 7 + 0.1x = -2 + 0.0 7 + 0.1x = -2 Add '-7' to each side of the equation. 7 + -7 + 0.1x = -2 + -7 Combine like terms: 7 + -7 = 0 0 + 0.1x = -2 + -7 0.1x = -2 + -7 Combine like terms: -2 + -7 = -9 0.1x = -9 Divide each side by '0.1'. x = -90 Simplifying x = -90
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