Question

Determine a soluçao do sistema {t+v=-7
3t-2v=4

Answer 1

{t+v=-7
{3t-2v=4


t+v=-7
t=-v-7

3t-2v=4
3(-v-7)-2v=4
-3v-21-2v=4
-5v=4+21
-5v=25
v=25/-5
V=-5

t+v=-7
t-5=-7
t=-7+5
t=-2