Question

If 5A+B3=65 then the value of AandB is :

Answer 1

Let the
5a+b3=65
A+3b=65/5
A=13-3b
So
Putt the value of a
5(13-3b)+3b=65
65-15b+3b=65
-12b=0
B=0/12
B=0
So putt the value of b
5a+3*0=65
5a+0=65
A=65/5
A=13
So
B=0 and a=13




I hope this will help u
By DEVANSH

Answer 2

Answer:

If 5A+B3=65 then the value of A and B is = 15  

Explanation :-

Given, 5A + 15 = B3  

Since it is given that, B3 instead of 3B. We must understand that, They are the digits of a two digit number rather than terms.  

So 5A corresponds to 50 + A  

B3 corresponds to 10B + 3.  

[ 5 is the tens place digit and A is the units digit for 5A]

[ B is the tens place digit and 3 is the units digit for B3]

Method of solving :  

We get a equation like,

50 +A + 15 = 10B + 3  

This is not enough to find A + B, or even A & B as it is linear equations in two variables.  

Now, We use the fact that, A & B are single digits.  

So, Observe the LHS and RHS

5A + 15 = B3  

From this, A + 5 = 3  

A = - 2 ( Not possible)  

But put A = 8,

We will get A + 5 = 13

So,Therefore A = 8  

Now, Go back to the equation,  

58 + 15 = 73 = B3  

So, B = 7.  

Therefore, A = 8, B = 7  

Finding A + B :  

A + B = 8 + 7 = 15  

Therefore, A + B = 15