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Simplifying -2(X + -7) + -140 = 5X + -7(X + -8) Reorder the terms: -2(-7 + X) + -140 = 5X + -7(X + -8) (-7 * -2 + X * -2) + -140 = 5X + -7(X + -8) (14 + -2X) + -140 = 5X + -7(X + -8) Reorder the terms: 14 + -140 + -2X = 5X + -7(X + -8) Combine like terms: 14 + -140 = -126 -126 + -2X = 5X + -7(X + -8) Reorder the terms: -126 + -2X = 5X + -7(-8 + X) -126 + -2X = 5X + (-8 * -7 + X * -7) -126 + -2X = 5X + (56 + -7X) Reorder the terms: -126 + -2X = 56 + 5X + -7X Combine like terms: 5X + -7X = -2X -126 + -2X = 56 + -2X Add '2X' to each side of the equation. -126 + -2X + 2X = 56 + -2X + 2X Combine like terms: -2X + 2X = 0 -126 + 0 = 56 + -2X + 2X -126 = 56 + -2X + 2X Combine like terms: -2X + 2X = 0 -126 = 56 + 0 -126 = 56 Solving -126 = 56 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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