A number consist of 2 digits whose sum is 4. If 18 is added to the number , the diyits get interchanged. Then the number is
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let unit place digit = x
let tens place digit =y
x+y=4
x=4-y equation 1
10y+x +18= 10x+y
9y+18=9x
y+2=x
putting value of x
y+2=4-y
2y=4-2
2y=2
y=2/2=1
therefore x= 4-1= 3.
si the no = 10y+x
= 10(1)+3
= 10+3=13
it's best answer and correct also.
I'm sure please mark it as brainlist
let tens place digit =y
x+y=4
x=4-y equation 1
10y+x +18= 10x+y
9y+18=9x
y+2=x
putting value of x
y+2=4-y
2y=4-2
2y=2
y=2/2=1
therefore x= 4-1= 3.
si the no = 10y+x
= 10(1)+3
= 10+3=13
it's best answer and correct also.
I'm sure please mark it as brainlist
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