1. A) 2/7x + 4=2 => 2/7x = 2-4 => x= -2 / 2/7 => x=-2*7/2 => x= -7 B) (2x-1)/3 - 1 = (x-1)/2 => (2x-1)/3 - (x-1)/2 = 1 => ( (2x-1)2 - (x-1)3 ) / 6 = 1 => 4x-2-3x+3=6 => x=6+2-3 => x=5 C) 5-(2x+3)=17 => -(2x+3)=17-5 => 2x+3= -12 => 2x=-12-3 = x=-15/2 => x=-7.5
2. (4-2y)/2=5y-1 => 4-2y=10y-2 => -2y-10y=-2-4 => -12y=-6 => y=0.2