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Simplifying 13 + -1(-1t) = 1t + -7 Remove parenthesis around (-1t) 13 + -1 * -1t = 1t + -7 Multiply -1 * -1 13 + 1t = 1t + -7 Reorder the terms: 13 + 1t = -7 + 1t Add '-1t' to each side of the equation. 13 + 1t + -1t = -7 + 1t + -1t Combine like terms: 1t + -1t = 0 13 + 0 = -7 + 1t + -1t 13 = -7 + 1t + -1t Combine like terms: 1t + -1t = 0 13 = -7 + 0 13 = -7 Solving 13 = -7 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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