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Simplifying 4 + -5a = 2a + -12 Reorder the terms: 4 + -5a = -12 + 2a Solving 4 + -5a = -12 + 2a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2a' to each side of the equation. 4 + -5a + -2a = -12 + 2a + -2a Combine like terms: -5a + -2a = -7a 4 + -7a = -12 + 2a + -2a Combine like terms: 2a + -2a = 0 4 + -7a = -12 + 0 4 + -7a = -12 Add '-4' to each side of the equation. 4 + -4 + -7a = -12 + -4 Combine like terms: 4 + -4 = 0 0 + -7a = -12 + -4 -7a = -12 + -4 Combine like terms: -12 + -4 = -16 -7a = -16 Divide each side by '-7'. a = 2.285714286 Simplifying a = 2.285714286
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