Answer:
x=−5 and y=−1
Explanation:
Let's solve your system by substitution.
y=2x+9;y=−x−6
Step: Solvey=2x+9for y:
y=2x+9
Step: Substitute2x+9foryiny=−x−6:
y=−x−6
2x+9=−x−6
2x+9+x=−x−6+x(Add x to both sides)
3x+9=−6
3x+9+−9=−6+−9(Add -9 to both sides)
3x=−15
3x
3
=
−15
3
(Divide both sides by 3)
x=−5
Step: Substitute−5forxiny=2x+9:
y=2x+9
y=(2)(−5)+9
y=−1(Simplify both sides of the equation)
Hope this helps!