A number consists if twi digits whole sum is 12. If 18 is added to the number, the digits are reserved. Find the number
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Let one's digit be x
Ten's digit = 12-x
Number = (12-x)*10+x
=120-10x+x=120-9x
120-9x+18=138-9x
After Interchanging digits, new number will be 10*x+ 12-x=9x+12
9x+12=138-9x
18x=126
x=7
One's digit is 7.
Ten's digit is 5.
Number is 57.
Please mark as brainliest.
Ten's digit = 12-x
Number = (12-x)*10+x
=120-10x+x=120-9x
120-9x+18=138-9x
After Interchanging digits, new number will be 10*x+ 12-x=9x+12
9x+12=138-9x
18x=126
x=7
One's digit is 7.
Ten's digit is 5.
Number is 57.
Please mark as brainliest.
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