12. What no. should be subtracted from -14/15 -1/30 ?
13. What number should subtracted from (3/4+1/3+2/5) to get -1/2 ?
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1)......let,
the required no.be x
-14/15 - x = -1/30
-14 -15x= -1/2
-30x = -1+28
x = -27/30
x = -9/10
2).....let,
the required no.be x
(3/4+1/3+2/5)-x=1/2
60+20+24/60 -x=1/2
104-60x/60 =1/2
104-60x=30
-60x=30-104
x = -74/-60
x = 37/30
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