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1/5-(1/7) = 0
1/5-1/7 = 0
2/35 = 0
L <> R
| 5(8-6x)=-140 | | 5x^2+20x+75=0 | | 0*x=1/2 | | 5x^2+25x+75=0 | | 2e^3x=8 | | 4x^2+25x+120=0 | | 4x^2+14x+120=0 | | n(10n+8)=0 | | 4x^2+14+120=0 | | 2z+5=11 | | 4x^2+14+107=0 | | z=X/y | | 4(4+5)+3=35 | | 4x^2+12+86=0 | | 1/2-4/9 | | .5b+7=10 | | 3x^2+12+86=0 | | 21x^2+14x/7x | | 1/4(2x-2)=8 | | 3x^2+55+215=0 | | 12x+4(x-2)=1607 | | 9x-7=2-5x | | 3x^2+55+225=0 | | 3x^2+100+225=0 | | 4x^2+100+225=0 | | 5x^2+100+225=0 | | 5x^2+71+443=0 | | 6x+15=16x+4 | | =1607 | | 5x^2+75+250=0 | | 6x^2+75+250=0 | | 6x-4(x-2)=1607 |