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4/1 = z/20
1/2 = z/100
7/(-3) = 1/6
3/1 = 12/x
1/4 = z/20
| 4/1=z/20 | | ×/2-5=7 | | 1/2=z/100 | | 20n-4m= | | 7/-3=1/6 | | 3/1=12/x | | 3(2b+1)=50 | | 7a+12b=23 | | 8x=3x+12 | | 36=x^3-2x^2+8x-16 | | 4t^2r-14tr+16r=0 | | -8=r | | 1/4=z/20 | | 3(b+1)=50 | | 6d=36.6 | | 75-50= | | 4t^2r-14tf+16r=0 | | K-2.4=12.8 | | 11+8x=43 | | 7x+12y=23 | | (18+x)4=680 | | 4139/x=260/800 | | 121^1/2 | | 0.5t+4=3 | | ln(8x+5)-ln(4x)=8 | | 75m=12 | | 30x-4=x+18is | | 450+0.04x=200+0.16x | | 50x=75+65x | | (18+x)4=732 | | 24/x=6 | | (p-1/11)(p- |