Giúp mik nhak, 1.-3/x=15/7 2.0,1/5=x/15 3.-4/1,2=x/3,6 4.-2,6/12=/-42 5.21/14=33/x 6.1,4/-5=2,1/x 7.0,12/3=0,21/x 8.x-2/3=4/5 9.x+3/-4=5/20 10.3/x-1=21/16
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Loga
Sinh Học lớp 12
