Determine whether the ordered pair (−4,−3) is a solution to the system: {x−y=−1 {2x−y=−5

Answer 1

Yes it is a solution

plug the values into each equation

-4-(-3)=-1

-4+3 =-1

2(-4) -(-3) = -5

-8+3 = -5

Or subtract the 1st equation from the 2nd to get

x = -5-(-1) =-5+1 = -4, plug that into the 1st equation to get

-4-y=-1

y = -4+1=-3