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Simplifying 5 + -7a = 135 + -42a Solving 5 + -7a = 135 + -42a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '42a' to each side of the equation. 5 + -7a + 42a = 135 + -42a + 42a Combine like terms: -7a + 42a = 35a 5 + 35a = 135 + -42a + 42a Combine like terms: -42a + 42a = 0 5 + 35a = 135 + 0 5 + 35a = 135 Add '-5' to each side of the equation. 5 + -5 + 35a = 135 + -5 Combine like terms: 5 + -5 = 0 0 + 35a = 135 + -5 35a = 135 + -5 Combine like terms: 135 + -5 = 130 35a = 130 Divide each side by '35'. a = 3.714285714 Simplifying a = 3.714285714
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