Question

{10r - 20s = 36
{ - 10r - s = 38

Answer 1

Resposta:

10r-20s=36

-10r-s=38

0r-21s=74

s=74/-21

s=-74/21

10r-20s=36

10r-20.-74/21=36$10r-\frac{1480}{21}=36\\ 10r=36-\frac{1480}{21} \\10r=-\frac{724}{21} \\r=-\frac{362}{105}$