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21/r-r = 4
(3*y)/y-8 = 0
7-(x/2)-1 = 6
2*ln(2*x)
2*ln(2*y)
| 9(c-88)=63 | | 4log(3x)=15 | | 18-3r=9 | | -11+7y=17 | | 6(n+4)=12 | | 200000-(-5x)=160000 | | 5abc-7abc+abc+2abc= | | -13+6v=2v-5+3v | | 35+9x=-28 | | 4x+2=4-3 | | (21/r)-r=4 | | 3y/y-8 | | 0.8s+1=9 | | 5u-10=45 | | 7-1-x/2=6 | | 160000+-5x=200000 | | 2d-8=6 | | 6z-4z-z+10z+3z= | | -3+12=-42 | | 0=p+18+5 | | 2+15=21 | | (-5x-4)-(-2-5x)x=5 | | C*4=8.96 | | Y-x=10-0.5x | | 3m+7m=7 | | 10=2p+4 | | Y=12-6x/-2 | | 8(7-y)=-14 | | C/4=8.96 | | Y-32x+11=0 | | 3a+3z= | | (d+3d)-(-d+2)d=5 |