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Simplifying -7(4x + -1) + 8 = -28x + 15 Reorder the terms: -7(-1 + 4x) + 8 = -28x + 15 (-1 * -7 + 4x * -7) + 8 = -28x + 15 (7 + -28x) + 8 = -28x + 15 Reorder the terms: 7 + 8 + -28x = -28x + 15 Combine like terms: 7 + 8 = 15 15 + -28x = -28x + 15 Reorder the terms: 15 + -28x = 15 + -28x Add '-15' to each side of the equation. 15 + -15 + -28x = 15 + -15 + -28x Combine like terms: 15 + -15 = 0 0 + -28x = 15 + -15 + -28x -28x = 15 + -15 + -28x Combine like terms: 15 + -15 = 0 -28x = 0 + -28x -28x = -28x Add '28x' to each side of the equation. -28x + 28x = -28x + 28x Combine like terms: -28x + 28x = 0 0 = -28x + 28x Combine like terms: -28x + 28x = 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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