Question

plz tell fast mathematics​

Answer 1

Step-by-step explanation:

LET THE 2 DIGIT NUMBER BE X AND Y

X+Y=8

Y=8-X

ORIGINAL NUMBER =10×X+8-X =9X+8

AFTER INTERCHANGING THE DIGITS

NEW NUMBER=10×(8-X)+X =80-10X+X=80-9X

*NEW NUMBER-ORIGINAL NUMBER =18

80-9X-(9X+8)=18

-18X+88=18

88-18=18X

70 =18X

X=?