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Simplifying 7 + -2a = -28 + 8a Solving 7 + -2a = -28 + 8a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-8a' to each side of the equation. 7 + -2a + -8a = -28 + 8a + -8a Combine like terms: -2a + -8a = -10a 7 + -10a = -28 + 8a + -8a Combine like terms: 8a + -8a = 0 7 + -10a = -28 + 0 7 + -10a = -28 Add '-7' to each side of the equation. 7 + -7 + -10a = -28 + -7 Combine like terms: 7 + -7 = 0 0 + -10a = -28 + -7 -10a = -28 + -7 Combine like terms: -28 + -7 = -35 -10a = -35 Divide each side by '-10'. a = 3.5 Simplifying a = 3.5
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