Question

plz solve the problem​

Answer 1

Step-by-step explanation:

20.

(a) 2x

(b)x+2x=81

(c)x=27

(d)27 , 54

21.

(a)2x

(b)2(2x)+3x=280

(c)x=40

(d)80

22.

(a)2x

(b)6x

(c)2(x+2x)=60

(d)x=10

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