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Simplifying 77x + -10 + -5x = 18 + 72x + -28 Reorder the terms: -10 + 77x + -5x = 18 + 72x + -28 Combine like terms: 77x + -5x = 72x -10 + 72x = 18 + 72x + -28 Reorder the terms: -10 + 72x = 18 + -28 + 72x Combine like terms: 18 + -28 = -10 -10 + 72x = -10 + 72x Add '10' to each side of the equation. -10 + 10 + 72x = -10 + 10 + 72x Combine like terms: -10 + 10 = 0 0 + 72x = -10 + 10 + 72x 72x = -10 + 10 + 72x Combine like terms: -10 + 10 = 0 72x = 0 + 72x 72x = 72x Add '-72x' to each side of the equation. 72x + -72x = 72x + -72x Combine like terms: 72x + -72x = 0 0 = 72x + -72x Combine like terms: 72x + -72x = 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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