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Simplifying -3 + -1(-7a) = 0 Remove parenthesis around (-7a) -3 + -1 * -7a = 0 Multiply -1 * -7 -3 + 7a = 0 Solving -3 + 7a = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 7a = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 7a = 0 + 3 7a = 0 + 3 Combine like terms: 0 + 3 = 3 7a = 3 Divide each side by '7'. a = 0.4285714286 Simplifying a = 0.4285714286
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