Question

Substitute the value x = -1 into the first equation and solve for y.

{ y= 2x - 1
-2x - y = 5

Answer 1

y = -3

Explanation:

Following the directions, we have ...

y = 2·(-1) -1 = -2-1 . . . . . . put -1 where x is in the equation

y = -3