Ответы на вопрос:
(2/3х+7/12): 6/11=1цел5/6 2/3х+7/12=1цел5/6*6/11 2/3х+7/12=1 2/3х=1-7/12 2/3х=5/12 х=5/12: 2/3 ответ: х=5/8
9х - 26 = 30 - 5х 9х + 5х = 30 +26 14х = 56 х= 56/14 х= 4 9*4 - 26 = 30 - 5*4 36 -26 = 30-20 10=10 7-3х = 6х -56 -3х -6х = -56 - 7 -9х = -63 х= (-63)/(-9) х=7 7 - 3*7 = 6*7 - 56 7-21 = 42 -56 -14= -14 5(х-4) = х+8 5х -20 = х+8 5х-х=8+20 4х=28 х=28/4 х=7 5(7-4) = 7+8 5*3 = 15 15=15
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