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13 = 4/5-16
13 = -76/5
L <> R
| 10x+159+81=180 | | x-55=-25 | | 4v+11=55 | | 8x^2+18y^2+18xy+2x-3y-2=0 | | y-5/4=-6 | | 0.75-2b=-3b | | A/9.05=8./ | | 7x+50=113 | | ×/12=-10 | | 9x-1=5x+8 | | y-10.24=5.8 | | 3n^2+8n=11 | | 13r=20 | | 1m=-5(4+1m)+2 | | cos^2x*(cos^2x/sin^2x) | | 2tan^2x-sec^2x=0 | | -11m^2=5 | | 3x+21=15x | | 4/10a=3/5 | | x^2+3*x=1852 | | 4p^2+1=11p | | -2x^2+60=2x | | 200=x-0.02x | | 1+5x=13+3x | | -n^2-12n=-45 | | 200=x-0.98*x | | x/2.4=3/8 | | -10v^2-3=0 | | 8x-19=21 | | -8v^2=8+2v | | 4h-3=5-(h-2) | | x+4x+2x+30=170 |