Question

Solve the system of equations by using subraction 2a+8b=-8 3a-5b=22

Answer 1

2a+8b=-8

3a-5b=22

Explanation:

multiplying the entire first row by 3 and the second row by 2

then,

6a+24b=-24

- 6a-10b=44

0+(34b)/34=-68/34

b= -2

then for a,

2a+8b=-8

2a+8(-2)=-8

2a-16=-8

2a= -8+16

a= 4