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Simplifying 1.2a + -3 = 2.15a Reorder the terms: -3 + 1.2a = 2.15a Solving -3 + 1.2a = 2.15a Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-2.15a' to each side of the equation. -3 + 1.2a + -2.15a = 2.15a + -2.15a Combine like terms: 1.2a + -2.15a = -0.95a -3 + -0.95a = 2.15a + -2.15a Combine like terms: 2.15a + -2.15a = 0.00 -3 + -0.95a = 0.00 Add '3' to each side of the equation. -3 + 3 + -0.95a = 0.00 + 3 Combine like terms: -3 + 3 = 0 0 + -0.95a = 0.00 + 3 -0.95a = 0.00 + 3 Combine like terms: 0.00 + 3 = 3 -0.95a = 3 Divide each side by '-0.95'. a = -3.157894737 Simplifying a = -3.157894737
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