Question

u=5+t

u-2t+1=5

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Answer 1

Объяснение:

$\left \{ {{u=5-t} \atop {u-2t+1=5}} \right. \ \ \ \ \left \{ {{u=5+t} \atop {5+t-2t=4}} \right. \ \ \ \ \left \{ {{u=t+5} \atop {1-t=0}} \right. \ \ \ \ \left \{ {{u=6} \atop {t=1}} \right. .$

Ответ: t=1, u=6.