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Simplifying 7(4x + -9) + 8 = 28x + -55 Reorder the terms: 7(-9 + 4x) + 8 = 28x + -55 (-9 * 7 + 4x * 7) + 8 = 28x + -55 (-63 + 28x) + 8 = 28x + -55 Reorder the terms: -63 + 8 + 28x = 28x + -55 Combine like terms: -63 + 8 = -55 -55 + 28x = 28x + -55 Reorder the terms: -55 + 28x = -55 + 28x Add '55' to each side of the equation. -55 + 55 + 28x = -55 + 55 + 28x Combine like terms: -55 + 55 = 0 0 + 28x = -55 + 55 + 28x 28x = -55 + 55 + 28x Combine like terms: -55 + 55 = 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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