Question

in the two digit number x,both the sum and the difference of its is 4.What is the value of x?​

Answer 1

40

Step-by-step explanation:

Let a and b be the two digits of x, so that x=10a+b. Given that a + b = 4 and a - b = 4, adding those two equations gives 2a = 8, or a = 4. Subtracting the two equations yields 2b = 0 (or -2b = 0) so that b = 0. Thus x = 40