91Ó°ÊÓ

Determine the nature of the system of linear equations \(2 \mathrm{x}+\mathrm{y}=6\) \(4 x+2 y=8\)

Determine the nature of the system of linear equations \(x+2 y=8\) \(x-2 y=2\)

Find two numbers such that twice the first added to the second equals 19 , and three times the first is 21 more than the second.

The three angles of a triangle are together equal to \(180^{\circ}\). The smallest angle is half as large as the largest one, and the sum of the largest and smallest angles is twice the third angle. Find the three angles.