Form simultaneous equations and solved using only one method.
2 answers:
Answer:
48
Step-by-step explanation:
48
Let the tens digit be x.
Hence, the units digit will be 2x
Number =10×(x)+(2x)=12x
When 36 is added to the number, the new number formed =12x+36
As the digits are reversed, we can also write the new number as 10×(2x)+x=21x
Hence,
12x+36=10×(2x)+x
⇒12x+36=21x
⇒21x−12x=36
⇒9x=36
⇒x=4
Hence, the original number =12x=12×4=48
Answer:
4
Step-by-step explanation:
12x+36=10{2x}+x
=12x+36=21x
=21x-12x-36
=9x=36
=4
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Answer:
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