Помогите пожалуйста ! Реши уравнения. 1) 5x - 1 = 9 2) 4 + 2x = -6 3) -7x - 2= 12 4) x/3=2 5) 1/2x= -3,5 6) 2x : 3 = 4 7) 4/x = 2 8) x/3 - 2 = 3 9) 2x/5 = 10

1) 5x - 1 = 9 5x=9+1 5x=10 x=10:5 x=2 ========== 2) 4 + 2x = -6 2x=-6-4 2x=2 x=2:2 x=1 ========= 3) -7x - 2= 12 -7x=12+2 -7x=14 x=14:(-7) x=-2 ============ 4) x/3=2 x=2*3 x=6 ========= 5) 1/2x= -3,5 x=-35/10*2/1 x=-7 =========== 6) 2x : 3 = 4 2x=4*3 2x=12 x=12:2 x=6 =========== 7) 4/x = 2 x=4:2 x=2 =========== 8) x/3 - 2 = 3 x/3=3+2 x/3=5 x=5*3 x=15 ========== 9) 2x/5 = 10 2x=10*5 2x=50 x=50:2 x=25