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Simplifying -7(4x + -3) + 4 = -28x + 25 Reorder the terms: -7(-3 + 4x) + 4 = -28x + 25 (-3 * -7 + 4x * -7) + 4 = -28x + 25 (21 + -28x) + 4 = -28x + 25 Reorder the terms: 21 + 4 + -28x = -28x + 25 Combine like terms: 21 + 4 = 25 25 + -28x = -28x + 25 Reorder the terms: 25 + -28x = 25 + -28x Add '-25' to each side of the equation. 25 + -25 + -28x = 25 + -25 + -28x Combine like terms: 25 + -25 = 0 0 + -28x = 25 + -25 + -28x -28x = 25 + -25 + -28x Combine like terms: 25 + -25 = 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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