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((3*r)/2)*(r/3)*y*y = 0
1/2*r^2*y^2 = 0
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x in (-oo:+oo)
| 50-2x=140-22x | | -21=-7y | | y-7=(11/4)(x-3) | | 5=z/9.1 | | (3x-3)=[6(x-10)] | | (3x/2y)(x/3y) | | 5/12=x/15 | | 80-x=93-2x | | 9x+7=2x+14 | | y-5=9/8(x-3) | | 0.3+4.2=0.1x+4 | | 3.6x=-9.36 | | 8y-3=25-6y | | 5.4x=5 | | 65=4w-15 | | 3x-(2x+4)=y | | 2k+9=7-3k | | -7/18x-4/9=7/12 | | 3=z/7.2 | | 0.25-1.25=0.55-0.35r | | 15(x-20)=375 | | e-10=10 | | 3x-4+2x=8 | | (3x-33)=(2x+25) | | 7d-9=5d+5 | | -15=5(3-10)-5q | | log3/4(25)=3x-1 | | 9(x-4)=-3x+7 | | 8+12n=116 | | 111.18=pir^2 | | 1.9r+0.1r=0.6 | | n/4-9n/14=1/7 |