Question

реши систему u+v=4 3u-5v=20

Answer 1

u+v=4
3u-5v=20

u=4-v
3(4-v)-5v=20,12-3v-5v=20,12-8v=20,8v=12-20,8v=-8,v=-1

u=4-v
v=-1

u=4-(-1)=4+1=5
v=-1

/u,v/=/5,-1/
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