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Simplifying 8(5 + r) = 40 + 8r (5 * 8 + r * 8) = 40 + 8r (40 + 8r) = 40 + 8r Add '-40' to each side of the equation. 40 + -40 + 8r = 40 + -40 + 8r Combine like terms: 40 + -40 = 0 0 + 8r = 40 + -40 + 8r 8r = 40 + -40 + 8r Combine like terms: 40 + -40 = 0 8r = 0 + 8r 8r = 8r Add '-8r' to each side of the equation. 8r + -8r = 8r + -8r Combine like terms: 8r + -8r = 0 0 = 8r + -8r Combine like terms: 8r + -8r = 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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