Solve the system with the addition method:
{(-20 x -16 y, =, 8),(-5 x -4 y,=, 2)
Solve the system with the addition method:
{(-20 x -16 y, =, 8),(-5 x -4 y,=, 2)
-20x - 16y = 8
-5x -4y = 2.
Multiply the second equation by -4 to get
20x + 16y = -8
Adding it to the first equation, we get
0 = 0
Since this solution is valid regardless of the value we put in for x, the solution set is all real numbers.