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q in (-oo:+oo)
((16*q)/20)*q^2 = 0
4/5*q^3 = 0 // : 4/5
q^3 = 0
q = 0
q = 0
| 2r-4r+7= | | 13-2x=3x+3 | | 14y-12y=8 | | 0.5x+3.5x-2.3-4.3=29.4 | | 19f^2+43f=0 | | 40=(.5)(.0005)(.0005) | | 4a+20=84 | | 40=(.5)(.0005)2 | | -84=8-4(-3x+2) | | x(10-X)=40 | | 138z/z+8z=324z/2z | | c=-384+12f | | -84-7x=8x-21 | | 2x-2y+16=12x-4 | | -2(x--3)-12=30 | | 420x=5000 | | -2k+15+4k+15=-6 | | (x-7)=20 | | k=140 | | 3/7m=21 | | c=12(f-32) | | 16x-3=32x+9 | | 5-3=7-4 | | x/2+2x=3x-1/4 | | 15a^2+23a-28=0 | | 9.8=5/1+10x/y | | 42x=5000 | | 1-3(2w+1)=8w-3(8+w) | | 15-3=4x+8x | | 42cmx=5m | | 90=-6(x-7) | | 4*1+5= |