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9. A two digit number is 2 more than 5 times the sum of its digits. If the digit in the tens place is 1 lessthan the digit in the units place, find the number.

Answer»

Answer:

10Y+x-5(x+y)=2

10y+x-5x-5y=2

-4x+5y=2. 1ST EQUATION

2ND equation= x-y=1

1st equation + 2nd equation *4 =

x-6=1

x=7

7-y=1

y=7-1=6

Number= 10y + x

10*6+7=67

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