ANSWERS: 1
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(we must assume that "x = X") Take all terms with "x" on the one side, and all terms without "x" on the other side; by changing the side of one element, you change its sign: 8x - 5 + 3x + 17 = 155 (8 + 3)x = 155 +5 -17 11x = 143 x = 13
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