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Simplifying -3x + -4(x + 1) = -7x + -4 Reorder the terms: -3x + -4(1 + x) = -7x + -4 -3x + (1 * -4 + x * -4) = -7x + -4 -3x + (-4 + -4x) = -7x + -4 Reorder the terms: -4 + -3x + -4x = -7x + -4 Combine like terms: -3x + -4x = -7x -4 + -7x = -7x + -4 Reorder the terms: -4 + -7x = -4 + -7x Add '4' to each side of the equation. -4 + 4 + -7x = -4 + 4 + -7x Combine like terms: -4 + 4 = 0 0 + -7x = -4 + 4 + -7x -7x = -4 + 4 + -7x Combine like terms: -4 + 4 = 0 -7x = 0 + -7x -7x = -7x Add '7x' to each side of the equation. -7x + 7x = -7x + 7x Combine like terms: -7x + 7x = 0 0 = -7x + 7x Combine like terms: -7x + 7x = 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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