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Simplifying x + -1t + 21 = x + -21 + -1t Reorder the terms: 21 + -1t + x = x + -21 + -1t Reorder the terms: 21 + -1t + x = -21 + -1t + x Add 't' to each side of the equation. 21 + -1t + t + x = -21 + -1t + t + x Combine like terms: -1t + t = 0 21 + 0 + x = -21 + -1t + t + x 21 + x = -21 + -1t + t + x Combine like terms: -1t + t = 0 21 + x = -21 + 0 + x 21 + x = -21 + x Add '-1x' to each side of the equation. 21 + x + -1x = -21 + x + -1x Combine like terms: x + -1x = 0 21 + 0 = -21 + x + -1x 21 = -21 + x + -1x Combine like terms: x + -1x = 0 21 = -21 + 0 21 = -21 Solving 21 = -21 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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