Y= -x+1 2x - y = 5 Solve the system of equations using the substitution method

y= -x+1 2x - y = 5 Solve the system of equations using the substitution method

since y=-x+1, you plug -x+1 into the second equation as y. so 2x-(-x+1) =5. then you have 2x+x-1=5 which becomes 3x-1=5. move 1 over to the other side and 3x=6. divide both sides by 3 and x=2. then you plug in x to one of the equations. y=-2+1. y=-1.
answer: x=2 and y=-1

y = -x + 1
2x - y = 5
2x - (-x + 1) = 5
3x = 6
x = 2
y = -1

x=2
y=-1