Answer :

(i) we have,

25x÷ 2x =


25x/2x = 220/5


25x-x = 24


4x = 4


x=1


(ii) We have,


(23)4 = (22)x


23.4 = 22.x


12 = 2x


X=6


(iii) We have,



52x-x/ 32x-x = ()3


5x/3x = ()3


()x = ()3


x=3


(iv) We have,


5x-2 × 32x-3 = 135


5x-2 × 32x-3 = 5


5x-2 × 32x-3 = 513


x-2 =1 ; 2x-3 =3


x=3 ; x= 3


(v) We have,


2x-5 × 5x-4 = 5


2x-5 × 5x-4 = 51 × 20


x-5=0 ; x-4 = 1


x= 4 ; x=1 +4 =5


(vi) We have,


2x-7 × 5x-4 = 1250


2x-7 × 5x-4 = 21 × 54


x – 7=1; x-4 = 4


x= 8; x= 4+4 = 8


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