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Simplifying 7(t + -3) + 7t = 7(2t + 5) + -12 Reorder the terms: 7(-3 + t) + 7t = 7(2t + 5) + -12 (-3 * 7 + t * 7) + 7t = 7(2t + 5) + -12 (-21 + 7t) + 7t = 7(2t + 5) + -12 Combine like terms: 7t + 7t = 14t -21 + 14t = 7(2t + 5) + -12 Reorder the terms: -21 + 14t = 7(5 + 2t) + -12 -21 + 14t = (5 * 7 + 2t * 7) + -12 -21 + 14t = (35 + 14t) + -12 Reorder the terms: -21 + 14t = 35 + -12 + 14t Combine like terms: 35 + -12 = 23 -21 + 14t = 23 + 14t Add '-14t' to each side of the equation. -21 + 14t + -14t = 23 + 14t + -14t Combine like terms: 14t + -14t = 0 -21 + 0 = 23 + 14t + -14t -21 = 23 + 14t + -14t Combine like terms: 14t + -14t = 0 -21 = 23 + 0 -21 = 23 Solving -21 = 23 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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