The tens digit of a two digit number excedds the unit digit by 5. if they are reversed b the new number is less by 45. if the v sum of their digits is 9 find the numbers

Question

Mathematics

Janessa Case

Today, 11:15

The tens digit of a two digit number excedds the unit digit by 5. if they are reversed b the new number is less by 45. if the v sum of their digits is 9 find the numbers

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Answers (1)

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Zaid Cordova · Answer 1

X and y are digts

x is tens y is ones

x=y+5

10y+x=10x+y-45

x+y=9

we have

x+y=9

x=y+5

sub

y+5+y=9

2y+5=9

minus 5

2y=4

divide 2

y=2

sub back

x=y+5

x=2+5

x=7

the number is 72