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Simplifying -90x + 45 = -90x + 45 Reorder the terms: 45 + -90x = -90x + 45 Reorder the terms: 45 + -90x = 45 + -90x Add '-45' to each side of the equation. 45 + -45 + -90x = 45 + -45 + -90x Combine like terms: 45 + -45 = 0 0 + -90x = 45 + -45 + -90x -90x = 45 + -45 + -90x Combine like terms: 45 + -45 = 0 -90x = 0 + -90x -90x = -90x Add '90x' to each side of the equation. -90x + 90x = -90x + 90x Combine like terms: -90x + 90x = 0 0 = -90x + 90x Combine like terms: -90x + 90x = 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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