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Simplifying 180 = (x + 30) + (180 + -1(x + 30)) Reorder the terms: 180 = (30 + x) + (180 + -1(x + 30)) Remove parenthesis around (30 + x) 180 = 30 + x + (180 + -1(x + 30)) Reorder the terms: 180 = 30 + x + (180 + -1(30 + x)) 180 = 30 + x + (180 + (30 * -1 + x * -1)) 180 = 30 + x + (180 + (-30 + -1x)) Combine like terms: 180 + -30 = 150 180 = 30 + x + (150 + -1x) Remove parenthesis around (150 + -1x) 180 = 30 + x + 150 + -1x Reorder the terms: 180 = 30 + 150 + x + -1x Combine like terms: 30 + 150 = 180 180 = 180 + x + -1x Combine like terms: x + -1x = 0 180 = 180 + 0 180 = 180 Add '-180' to each side of the equation. 180 + -180 = 180 + -180 Combine like terms: 180 + -180 = 0 0 = 180 + -180 Combine like terms: 180 + -180 = 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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