Question

plz answer
answers is 15
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Answer 1

Step-by-step explanation:

take the common as 2^x

2^x(2+2²)=192

2^x(2+4)=192

2^x(6)=192

2^x=32

2^x=2^5

bases are equal the powers also equal

x=5

then 3x=3*5=15