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i in (-oo:+oo)
3/6-i = 0
1/2-i = 0 // - 1/2
-i = -1/2 // * -1
i = 1/2
i = 1/2
| 4(4x-2y)+-3x+7y= | | (-a-4b+2)5ab= | | 5x+12-4x+7= | | 2x-(2-x)=10 | | 5x-14x+1=0 | | -5(x+8)+159=19+20 | | 3(4x+-3y)+x+3y= | | 9x+4=5x+18 | | 6/y=y | | 4(3y+4)=-39 | | 7/4y=10 | | 0.20x+0.35(70)=35.5 | | -12+5(5s-1)=20s+3 | | 0.5x-14=0.1(x+20) | | 6/5y-3=4 | | -4(x-2)=3(2-x) | | 4(7x+28)=56 | | 12r+4r+5r+5-2= | | x/1-3=x-31/3 | | 4*30-45= | | (2-i)(2+i)= | | 3x(3.9)=11.7 | | x(7x+45)+50=0 | | 5r-2=3r+12 | | 7a-4a+12a=15a | | 7a-4a+12a=15 | | -10(x+3)+259=23+26 | | 3/y=10 | | 15=7a-4a+12a | | 6*14-2= | | y/4-2=7.5 | | 15a=7a-4a+12a |