a) <=> \(2x^2-8x+3x-12+x^2-7x+10=3x^2-5x-12x+20\)
<=> \(2x^2-8x+3x-12+x^2-7x+10-3x^2+5x+12x-20=0\)
<=> \(5x-22=0\)
<=> \(5x=22\)
<=> \(x=\frac{22}{5}\)
b) <=> \(24x^2-9x+16x-6-4x^2-7x-16x-28=10x^2+5x-2x-1\)
<=> \(24x^2-9x+16x-6-4x^2-7x-16x-28-10x^2-5x+2x+1=0\)
<=> \(10x^2-19x-33=0\)
<=> \(10x^2-30x+11x-33=0\)
<=> \(10x\left(x-3\right)+11\left(x-3\right)=0\)
<=> \(\left(x-3\right)\left(10x+11\right)=0\)
<=> \(x=3;x=-\frac{11}{10}\)