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Simplifying 87 = 3a Solving 87 = 3a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3a' to each side of the equation. 87 + -3a = 3a + -3a Combine like terms: 3a + -3a = 0 87 + -3a = 0 Add '-87' to each side of the equation. 87 + -87 + -3a = 0 + -87 Combine like terms: 87 + -87 = 0 0 + -3a = 0 + -87 -3a = 0 + -87 Combine like terms: 0 + -87 = -87 -3a = -87 Divide each side by '-3'. a = 29 Simplifying a = 29
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