Ответы на вопрос:
А) 3х = 28 -х 3х+х = 28 4х = 28 х = 7 б) 6х - 19 = -х -10 6х + х = 19 - 10 7х = 9 х = 1 2/7 в) 5х + 12 = -8х + 30 5х + 8х = 30 - 12 13х = 18 х = 1 5/18 г) 7- 2х = 3х - 18 -2х -3х = -18-7 -5х = - 25 х = 5 д) 33 +8х = -5х +72 8х - 5х = 72 - 33 3х = 39 х = 13 е) 2х + 9 = 2х - 4 2х - 2х = -4 - 9 х = - 13
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