-3y=5-2x
-y=(5-2x)/3
y=(2x-5)/3
{a+b=32
{a^2-b^2=176
a=32-b
(32-b)^2-b^2=176
1024-64b+b^2-b^2=176
64b=848
b=13,25
a=18,75
<span>Sin nα*cos α- Sin α*cos nα=sin(nα-</span><span>α)</span>