1) -3х + 9 = 0 -3х = -9 х = -9/-3 х= 3
2) -5х + 6 = 0 -5х = -6 х = -6/-5 х= -1 1/5
3) 5х - 3 = -10х 5х + 10х = 3 15х = 3 х = 3/15 = 1/5
4) х + 9 = -9х х + 9х = -9 10х = -9 х = - 9/10
5) 3х - 8 = -х 3х + х = 8 4х = 8 х = 8/4 х = 2
6) -7 = 5(х+5) -7 = 5х + 25 -5х = 25 + 7 -5х = 32 х = 32/-5 х = -6 2/5
7) 2(7 + 9х) = -6х + 2 14 + 18х = -6х + 2 18х + 6х = 2 - 14 24х = -12 х = - 12/24 = - 1/2