Реши систему уравнений {a=7 2a-b=17Ответ: =a=,b=.

Ответ: $a=7;b=-3$

Пошаговое объяснение:

\left \{ {{a=7} \atop {2(7)-b=17}} \right. =>\left \{ {{a=7} \atop {-b-3=0}} \right. => \left \{ {{a=7} \atop {b=-3}} \right." alt="\left \{ {{a=7} \atop {2a-b=17}} \right. => \left \{ {{a=7} \atop {2(7)-b=17}} \right. =>\left \{ {{a=7} \atop {-b-3=0}} \right. => \left \{ {{a=7} \atop {b=-3}} \right." align="absmiddle" class="latex-formula">

$a=7;\\b=-3$