Evaluate -x for x = -3

x=3

Step-by-step explanation:

Multiply -1 on both sides of equation

-1 . x = (-1).(-3)

-x = 3

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.