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15/21 = 20/7
5/7 = 20/7
L <> R
| 4Ln(-x)=18 | | 24-14y=28 | | 2.16+0.03x=0.36+0.06x | | 39x+24=180 | | -3y-15=93 | | 8z-2b+14a= | | -2z-3(x-2z)=0 | | 0.4x-0.3=1.6 | | log(x-6)-8=-6 | | -7x-27=8-(2x-10) | | 11x+1=10(x-2)+3 | | 5=y+2x | | 4+6x=-6x+6 | | 9a=6a-60 | | ln(3x-14)=4 | | 5y+14=49 | | m-10=3m | | .1y=18+.3x | | 2b-16=8b-72 | | -3x+2y=-13 | | 1/3×39 | | (O)t-3t= | | 2x+12=8x-8x | | 99=22+35 | | 7x-2(3x+5)=26+7x | | x^2+.75x+.06=0 | | 2x^2+4x+3=4x-1 | | 2/8=g/28 | | 4(9+5d)=36 | | -490t^2+1260t=810 | | -2.25y=.9 | | 49=7f-14 |