Question

Решите систему уравнений

Answer 1

(1/3v-0.125u=3) *3
7u+9v+2=0

v-0.375u=9
7u+9v+2=0

v=9+0.375u

7u+9(9+0.375u)+2=0
7u+81+3.375u+2=0
10.375u=-83
u=-8

7*-8+9v+2=0
9v=56-2
v=6