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Simplifying 7 + -4a = 4(1 + -1a) + 3 7 + -4a = (1 * 4 + -1a * 4) + 3 7 + -4a = (4 + -4a) + 3 Reorder the terms: 7 + -4a = 4 + 3 + -4a Combine like terms: 4 + 3 = 7 7 + -4a = 7 + -4a Add '-7' to each side of the equation. 7 + -7 + -4a = 7 + -7 + -4a Combine like terms: 7 + -7 = 0 0 + -4a = 7 + -7 + -4a -4a = 7 + -7 + -4a Combine like terms: 7 + -7 = 0 -4a = 0 + -4a -4a = -4a Add '4a' to each side of the equation. -4a + 4a = -4a + 4a Combine like terms: -4a + 4a = 0 0 = -4a + 4a Combine like terms: -4a + 4a = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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