Question

Sum of 2 digits of a number is 12.if the digit in one's place x is 3 less than two times digit in ten's place y,find the number by solving the equations

Answer 1

Answer:

x = 7 and y = 5

Step-by-step explanation:

x + y = 12 (eq.1)

x = 2y - 3 (eq.2)

EQ.1

(2y - 3) + y = 12 (Putting x = 2y - 3)

=> 3y - 3 = 12

=> 3y = 12 + 3

=> y = 15/3 = 5

EQ.2

x = 2 × 5 - 3 (Putting y = 5)

=> x = 10 - 3

=> x = 7