A)(2-7x)/6+(4x+7)/3=-9/2 /.6
2-7x+2(4x+7)=-27
2-7x+8x+14=-27
x+16=-27
x=-27-16
x=-43
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b)(3x+1)/(x+2) - (x-1)/(x-2)=1
(3x+1)(x-2)-(x-1)(x+2)=(x+2)(x-2)
3x²-6x+x-2-x²-2x+x+2=x²-4
2x²-6x=x²-4
x²-6x+4=0,D=36-16=20,√D=√20=2√5
x1=(6+2√5)/2=3+√5
x2=(6-2√5)/2=3-√5