Question

{5a-4b= -7
{a-3/5b=-2 ​

Answer 1

Explicación paso a paso:

5a= -7-4b

5a=11b

a= 11/5

a= 2.2

5(2.2)-4b= -7

11-4b= -7-11

4b=- 18

b= -18/4

b= -4.5

5(2.2)+4(-4.5)= -7

11-18= -7