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Simplifying 0.4(1027.5 + -50r) = 411 + -20r (1027.5 * 0.4 + -50r * 0.4) = 411 + -20r (411 + -20r) = 411 + -20r Add '-411' to each side of the equation. 411 + -411 + -20r = 411 + -411 + -20r Combine like terms: 411 + -411 = 0 0 + -20r = 411 + -411 + -20r -20r = 411 + -411 + -20r Combine like terms: 411 + -411 = 0 -20r = 0 + -20r -20r = -20r Add '20r' to each side of the equation. -20r + 20r = -20r + 20r Combine like terms: -20r + 20r = 0 0 = -20r + 20r Combine like terms: -20r + 20r = 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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