3,7 * (2,5х - 7,6) = - 3,66 + 2,1х 9,25х - 28,12 = - 3,66 + 2,1х 9,25х - 2,1х = - 3,66 + 28,12 7,15х = 24,46 х = 24,46 : 7,15 х = 2446/715 х = 3 301/715