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Simplifying -4(x + -1) + -3x = 7 + -7(x + 7) Reorder the terms: -4(-1 + x) + -3x = 7 + -7(x + 7) (-1 * -4 + x * -4) + -3x = 7 + -7(x + 7) (4 + -4x) + -3x = 7 + -7(x + 7) Combine like terms: -4x + -3x = -7x 4 + -7x = 7 + -7(x + 7) Reorder the terms: 4 + -7x = 7 + -7(7 + x) 4 + -7x = 7 + (7 * -7 + x * -7) 4 + -7x = 7 + (-49 + -7x) Combine like terms: 7 + -49 = -42 4 + -7x = -42 + -7x Add '7x' to each side of the equation. 4 + -7x + 7x = -42 + -7x + 7x Combine like terms: -7x + 7x = 0 4 + 0 = -42 + -7x + 7x 4 = -42 + -7x + 7x Combine like terms: -7x + 7x = 0 4 = -42 + 0 4 = -42 Solving 4 = -42 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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