Решите уравнения: 3х-5=-4х+1 2(х+7)=9-2х 3/4(4х+8)=9-(7х-1) ЗАРАНЕЕ СПАСИБО!
1. 3х-5= -4х+1 3x + 4x = 5+1 7x = 6 x = 6/7 2. 2(х+7)=9-2х 2x + 14 = 9 -2x 2x + 2x = 9-14 4x = -5 x = -5/4 3. 3/4(4х+8)=9-(7х-1) 3x + 6 = 9 -7x + 1 3x + 7x = 9 -6+1 10x = 4 x = 4/10 = 2/5