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Simplifying 7a + -4a + -13a + -30 = 5a Reorder the terms: -30 + 7a + -4a + -13a = 5a Combine like terms: 7a + -4a = 3a -30 + 3a + -13a = 5a Combine like terms: 3a + -13a = -10a -30 + -10a = 5a Solving -30 + -10a = 5a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5a' to each side of the equation. -30 + -10a + -5a = 5a + -5a Combine like terms: -10a + -5a = -15a -30 + -15a = 5a + -5a Combine like terms: 5a + -5a = 0 -30 + -15a = 0 Add '30' to each side of the equation. -30 + 30 + -15a = 0 + 30 Combine like terms: -30 + 30 = 0 0 + -15a = 0 + 30 -15a = 0 + 30 Combine like terms: 0 + 30 = 30 -15a = 30 Divide each side by '-15'. a = -2 Simplifying a = -2
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