Ответ:
\(165.64-(a-12.5)=160.54\)
\(a-12.5=165.64-160.54=5.1\)
\(a=5.1+12.5=17.6\)
\(278.74-(6.5-b)=276.84\)
\(6.5-b=278.74-276.84=1.9\)
\(-b=1.9-6.5=-4.6\)
\(b=4.6\)
Ответ: \(a=17.6\); \(b=4.6\).
\(165.64-(a-12.5)=160.54\)
\(a-12.5=165.64-160.54=5.1\)
\(a=5.1+12.5=17.6\)
\(278.74-(6.5-b)=276.84\)
\(6.5-b=278.74-276.84=1.9\)
\(-b=1.9-6.5=-4.6\)
\(b=4.6\)
Ответ: \(a=17.6\); \(b=4.6\).