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Simplifying -1.4(a + 6) = 4.2 Reorder the terms: -1.4(6 + a) = 4.2 (6 * -1.4 + a * -1.4) = 4.2 (-8.4 + -1.4a) = 4.2 Solving -8.4 + -1.4a = 4.2 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '8.4' to each side of the equation. -8.4 + 8.4 + -1.4a = 4.2 + 8.4 Combine like terms: -8.4 + 8.4 = 0.0 0.0 + -1.4a = 4.2 + 8.4 -1.4a = 4.2 + 8.4 Combine like terms: 4.2 + 8.4 = 12.6 -1.4a = 12.6 Divide each side by '-1.4'. a = -9 Simplifying a = -9
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