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Simplifying -7 + 7a + -3a = 1 + 8a Combine like terms: 7a + -3a = 4a -7 + 4a = 1 + 8a Solving -7 + 4a = 1 + 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 + 4a + -8a = 1 + 8a + -8a Combine like terms: 4a + -8a = -4a -7 + -4a = 1 + 8a + -8a Combine like terms: 8a + -8a = 0 -7 + -4a = 1 + 0 -7 + -4a = 1 Add '7' to each side of the equation. -7 + 7 + -4a = 1 + 7 Combine like terms: -7 + 7 = 0 0 + -4a = 1 + 7 -4a = 1 + 7 Combine like terms: 1 + 7 = 8 -4a = 8 Divide each side by '-4'. a = -2 Simplifying a = -2
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