Question

(Elimination Strategies) Which of these strategies would eliminate a variable in the system of equations? x - 2y = 115x + 3y = -11Choose all that apply : A) Add the equations B) Multiply the top equation by 5 , then add the equations . C) Multiply the top equation by -5, then add the equations .

Answer 1

As we can see the only one is the option C

-5*(x-2y=11)=-5x+10y=-55

5x+3y=-11

then we add the equations

13y=-66

y=-66/13=-5.07

as we can see C is the correct answer