Solve the system by substitution.

-3x-4y=11

y=2x

x = -1, y = -2

Step-by-step explanation:

-3x-4y=11

y=2x

Plug in 2x for y:

-3x-4(2x)=11

-3x-8x = 11

-11x = 11

x =-1

Plug in x in y = 2x

y = 2(-1)

y = -2

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.