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r/5 = 7/7
-17 = 4/4-13
11/9 = k/4
12-((1*y)/5) = 0
1*x-(20/6) = 0
| 2x+20=5x+100 | | 12=15k | | -21+7=77 | | A=2*4.6+3*1.97 | | -49m-15=69 | | 12x-72=2x-9 | | 6x-1=4x-8 | | 01+10= | | r/5=7/7 | | (2x+6)(-7x+14)=0 | | 12x=-10+70 | | X^2-4=-5x | | -11=1 | | (x+5)(x+5)=-15 | | x+5+x+125=360 | | 4x-0.8=-4 | | -x+8+3x=-6 | | 11/9=k/4 | | (X)=-2x-5 | | 12+x+3=20 | | 14x-11y=-25 | | 4(7-3x)=4 | | 40x^2+40x+1040=0 | | 12-1y/5 | | ×/4-6=-10 | | -3=-30-9r | | 18+8=1 | | 4+-4=-2+8 | | 1x-20/6 | | 9x+7y=28 | | 8.03x+24.09=48.18 | | 6.22x+43.54=87.08 |