Question

Решите систему уравнений
СРОЧНОО!!!!
{ a+3b=2
{ 2a+3b=7​

Answer 1

$left { {{a+3b=2} atop {2a+3b=7}} right. ;left { {{a=2-3b} atop {2(2-3b)+3b=7}} right.;left { {{a=2-3b} atop {4-6b+3b=7}} right.; left { {{a=2-3b} atop {-3b=7-4}} right. left { {{a=2-3b} atop {3b=-3}} right. left { {{a=2-3(-1)} atop {b=-1}} right. left { {{a=5} atop {b=-1}} right.$