Q3. Find the value of A to make the expression true:-
a) 66÷a=-11
b) 90÷-a=5
c) a÷1=-16
d) -81÷a-2=-9​

2 thoughts on “Q3. Find the value of A to make the expression true:-<br />a) 66÷a=-11<br />b) 90÷-a=5<br />c) a÷1=-16<br />d) -81÷a-2=-9​”

1. Answer:

   a) 66 = –11

   a

   Cross multiplication

   66*1 = –11*a

   = 66= –11a

   = a=66

   –11

   a= –6 Ans

   b)90= 5

   a

   = Cross multiplication

   90*1=5*a

   = 90=5a

   = a= 90

   5

   a= 18 Ans

   c) a= –16

   1

   Cross multiplication

   = –16*1=a*1

   = –16=a

   =a=–16 Ans

   d)–81– 2 =–9

   a

   = Cross multiplication

   = –81–2*1=–9*a

   = –81–2 = –9a

   = –83 = –9a

   = a= –83

   –9 Ans

   Hope it helps you please mark me as brainleist it took a lot of time to write.

   Reply

2. Step-by-step explanation:

   1) 66/a= -11

   a= -11/66

   a= -1/6

   2)90/-a= 5

   -a= 5/90

   -a= 1/18

   a= -1/18

   3)a/1 = -16

   a=-16

   4)-81/a-2=-9

   =-9×a-2/-81

   =-9a+18/-81

   =-9(a-2)/-81

   =a-2/9

   -a= -2/9

   a= 2/9

   Plz mark me as brainlist.

   Reply