Plz answer correctly those who will answer correct I will mark as brainlist
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1.-(-19/21)=-(-a)
+19/21=+a
2. let a be minus 5 by 2 b e is equals to -2 and C is equals to 11 by 3
now by putting this values in the equation we get,-5/2x(-2+11/3)
=-5/2x(-6+11/3)
=-5/2x*5/3
=-25/6x
please do third fourth and fifth by your own
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