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Mkey [24]
3 years ago
7

Form simultaneous equations and solved using only one method.

Mathematics
2 answers:
kolbaska11 [484]3 years ago
3 0

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

daser333 [38]3 years ago
3 0

Answer:

4

Step-by-step explanation:

12x+36=10{2x}+x

=12x+36=21x

=21x-12x-36

=9x=36

=4

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