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Simplifying 3(7x + -8) + -5 = 21x + -29 Reorder the terms: 3(-8 + 7x) + -5 = 21x + -29 (-8 * 3 + 7x * 3) + -5 = 21x + -29 (-24 + 21x) + -5 = 21x + -29 Reorder the terms: -24 + -5 + 21x = 21x + -29 Combine like terms: -24 + -5 = -29 -29 + 21x = 21x + -29 Reorder the terms: -29 + 21x = -29 + 21x Add '29' to each side of the equation. -29 + 29 + 21x = -29 + 29 + 21x Combine like terms: -29 + 29 = 0 0 + 21x = -29 + 29 + 21x 21x = -29 + 29 + 21x Combine like terms: -29 + 29 = 0 21x = 0 + 21x 21x = 21x Add '-21x' to each side of the equation. 21x + -21x = 21x + -21x Combine like terms: 21x + -21x = 0 0 = 21x + -21x Combine like terms: 21x + -21x = 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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