Question

Selve each system of equations using elimination method.
5r+2s=23
4r+s=19
​

Answer 1

Answer:

s=-1

r=5

Step-by-step explanation:

5r+2s=23---------1

4r+s=19----------2

multiply 2nd equation by 2

then equation obtained

8r+2s=38---------3

subtract 1 from 3

8r+2s-(5r+2s)=38-23

8r+2s-5r-2s=15

3r=15

r=5

put the value of r=5 in 2

4*5+s=19

20+s=19

s=-1