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81/15-(511/20) = 0
27/5-(511/20) = 0
27/5-511/20 = 0
-403/20 = 0
L <> R
| (4b+5)/(2b+1)=(6b+1)/(3b-1) | | 10x+20=12x+28 | | x+9-9/4 | | -3.5t=2.31 | | f(x)=x^2+2x+3 | | -37=3(6.5)+11-7(6.5) | | 15x=630 | | 22(3x-2)-3x=5 | | 16d+6d+8=-14 | | 2-x=5/7x-94/7 | | X/3-5=4 | | -3t=2.31 | | 11x+3=25 | | 11+7/9n=4 | | 11-15/3=6 | | 3x+12=x+5 | | 10=-x/6 | | 8(x-5)+20=-68 | | y=--3+1 | | 8-10x=168 | | z=(-1) | | 4(-9-7x)=300 | | x-15/3=6 | | 4/3=12 | | 0.04m-1.6=0.8 | | 8.6=d+4-2.4 | | 11a/7=121 | | 5x+12y=99 | | 4b+5/2b+1=6b+1/3b-1 | | x=5+-4y | | 15a^2+63a+12=0 | | 4x=320 |