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Simplifying 1.8(4 + -1x) = 1.6(2 + -1x) (4 * 1.8 + -1x * 1.8) = 1.6(2 + -1x) (7.2 + -1.8x) = 1.6(2 + -1x) 7.2 + -1.8x = (2 * 1.6 + -1x * 1.6) 7.2 + -1.8x = (3.2 + -1.6x) Solving 7.2 + -1.8x = 3.2 + -1.6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6x' to each side of the equation. 7.2 + -1.8x + 1.6x = 3.2 + -1.6x + 1.6x Combine like terms: -1.8x + 1.6x = -0.2x 7.2 + -0.2x = 3.2 + -1.6x + 1.6x Combine like terms: -1.6x + 1.6x = 0.0 7.2 + -0.2x = 3.2 + 0.0 7.2 + -0.2x = 3.2 Add '-7.2' to each side of the equation. 7.2 + -7.2 + -0.2x = 3.2 + -7.2 Combine like terms: 7.2 + -7.2 = 0.0 0.0 + -0.2x = 3.2 + -7.2 -0.2x = 3.2 + -7.2 Combine like terms: 3.2 + -7.2 = -4 -0.2x = -4 Divide each side by '-0.2'. x = 20 Simplifying x = 20
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