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Simplifying -130 = -5(5 + 7a) -130 = (5 * -5 + 7a * -5) -130 = (-25 + -35a) Solving -130 = -25 + -35a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '35a' to each side of the equation. -130 + 35a = -25 + -35a + 35a Combine like terms: -35a + 35a = 0 -130 + 35a = -25 + 0 -130 + 35a = -25 Add '130' to each side of the equation. -130 + 130 + 35a = -25 + 130 Combine like terms: -130 + 130 = 0 0 + 35a = -25 + 130 35a = -25 + 130 Combine like terms: -25 + 130 = 105 35a = 105 Divide each side by '35'. a = 3 Simplifying a = 3
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