Question

how many tens should be added to the result after subtracting 10 units from 42 tens for getting the sum five hundred?

Answer 1

9 tens should be added to the result after subtracting 10 units from 42 tens for getting the sum five hundred.

=>x*10+42*10-10=500
=>10x+420-10=500
=>10x+410=500
=>10x=90
=>x=9

Answer 2

Answer:

9 tens should be added to the result after subtracting 10 units from 42 tens for getting the sum five hundred.

Step-by-step explanation:

Given : The result after subtracting 10 units from 42 tens for getting the sum five hundred.

To find : How many tens should be added to the result?

Solution :

Let the tens be x,

According to question,

$x\times10+42\times10-10=500$

$10x+420-10=500$

$10x+410=500$

$10x=90$

$x=9$

Therefore, 9 tens should be added to the result after subtracting 10 units from 42 tens for getting the sum five hundred.