Solve the system of equations below by graphing them with a pencil and paper. Enter your answer as an ordered pair
y = x + 5

y = -2x - 1

Question

Solve the system of equations below by graphing them with a pencil and paper. Enter your answer as an ordered pair
y = x + 5

y = -2x - 1

anonymous · Answer

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

anonymous · Answer

Just out of boredness, I'll solve this by substitution as well.

y = x + 5      MULTIPLY by 2
y = -2x - 1

2y = 2x + 10 
y = -2x - 1
____________
3y = 9 
3y/3 = 9/3

y = 3
Sub Y into the either equation. 
(Since it was solved via first equation, I'll do the second one)
(3) = -2x - 1
3 + 1 = -2x
4/-2 = -2x/-2
-2 = x
(x,y)
(-2,3)