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Simplifying 0.18 + 0.1(20 + -1a) = 0.14(20) 0.18 + (20 * 0.1 + -1a * 0.1) = 0.14(20) 0.18 + (2 + -0.1a) = 0.14(20) Combine like terms: 0.18 + 2 = 2.18 2.18 + -0.1a = 0.14(20) Multiply 0.14 * 20 2.18 + -0.1a = 2.8 Solving 2.18 + -0.1a = 2.8 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.18' to each side of the equation. 2.18 + -2.18 + -0.1a = 2.8 + -2.18 Combine like terms: 2.18 + -2.18 = 0.00 0.00 + -0.1a = 2.8 + -2.18 -0.1a = 2.8 + -2.18 Combine like terms: 2.8 + -2.18 = 0.62 -0.1a = 0.62 Divide each side by '-0.1'. a = -6.2 Simplifying a = -6.2
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