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Simplifying 5 + -7r = -3 + -1(7r + -8) Reorder the terms: 5 + -7r = -3 + -1(-8 + 7r) 5 + -7r = -3 + (-8 * -1 + 7r * -1) 5 + -7r = -3 + (8 + -7r) Combine like terms: -3 + 8 = 5 5 + -7r = 5 + -7r Add '-5' to each side of the equation. 5 + -5 + -7r = 5 + -5 + -7r Combine like terms: 5 + -5 = 0 0 + -7r = 5 + -5 + -7r -7r = 5 + -5 + -7r Combine like terms: 5 + -5 = 0 -7r = 0 + -7r -7r = -7r Add '7r' to each side of the equation. -7r + 7r = -7r + 7r Combine like terms: -7r + 7r = 0 0 = -7r + 7r Combine like terms: -7r + 7r = 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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