The difference of two numbers is -1. If twice the first number is added to tree times the second number,the result is 13.what are the numbers???

Question

Plz help I need this by today

Answer 1

a - b = - 1

2a + 3b = 13

 

First, solve the first equation for a or b. Let's do a.

 

a = b - 1

 

Now, substitute.

 

2(b - 1) + 3b = 13

2b - 2 + 3b = 13

5b = 15

b = 3

 

a = 3 - 1

a = 2