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Simplifying -4r + 5 = 2(2.5 + -2r) Reorder the terms: 5 + -4r = 2(2.5 + -2r) 5 + -4r = (2.5 * 2 + -2r * 2) 5 + -4r = (5 + -4r) Add '-5' to each side of the equation. 5 + -5 + -4r = 5 + -5 + -4r Combine like terms: 5 + -5 = 0 0 + -4r = 5 + -5 + -4r -4r = 5 + -5 + -4r Combine like terms: 5 + -5 = 0 -4r = 0 + -4r -4r = -4r Add '4r' to each side of the equation. -4r + 4r = -4r + 4r Combine like terms: -4r + 4r = 0 0 = -4r + 4r Combine like terms: -4r + 4r = 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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