Question

answer this question fast​

Answer 1

Step-by-step explanation:

let the unit digit be x

so the tens digit will become 3-x

acc. to ques.

7[10(3-x)+(x)]=4[10(x)+(3-x)]

7[30-10x+x]=4[10x+3-x]

7[30-9x]=4[9x+3]

210-63x=36x+12

210-12=36x+63x

198=99x

198/99=x

x=2

ones digit=x=2

tens digit=3-x=3-2=1

number=12

lhs=7(12)=84

the=4(21)=84

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