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4;3.50
2*b-(4*a)+2*c+6+0;0-a-b-(2*c);3*b-(9*a)-(2*c)+28
a+b+2*c;4*a-(2*b)+2*c-6;9*a+3*b+2*c-28
2.40;0.60
2*b-(4*a)+2*c+6+0;0-a-b-(2*c);3*b-(9*a)-(2*c)+28
| (2x-5)=3x+x-2x | | 5x-9=7x+3 | | 5(n-1/10) | | x=8x+15 | | 6x-(-14x)-3x=-17 | | 100000/304.88=180000/X | | 5x*5x+48-80x=0 | | x^2+12x=-c | | (-15w)-(-13w)=-8 | | 2(2x+20)=120 | | w^2-3=350 | | 10q-q-4q+3=18 | | X/6=30/6 | | 9*(8-5)=3x*(8-5) | | 6w+5=4 | | 19g+2g-g-6=14 | | 5h-h-4h+4h=16 | | 25=5(-3x+8) | | 13n-2n-2n=18 | | x/-4=2/7 | | 10g-8g+2g-g=18 | | 9*(r-5)=3x*(r-5) | | 8y-6y+y=9 | | 240+68x+4x^2=816 | | 5x^2-20x+100=0 | | 19c+2c-14c+4c-10c=8 | | cos(x)=2.45 | | -12u+-16+17u+-9u+4u=16 | | y=24000+60x | | 2k-k+k-k=13 | | b+4b-3b-2b+4b=4 | | 3v+2v+4v=18 |