Question

-2x+5y=-15 5x+2y=-6 How could you solve this system using elimination?

Answer 1

Answer:

-2x+5y= -15

=>2x-5y=15

=>2(2x-5y)=2×15 [Multiplying 2 to both the sides]

=>4x-10y=30......(1)

5x+2y= -6

=>5(5x+2y)= -6×5 [Multiplying 5 to both the sides]

=>25x+10y= -30.....(2)

Adding (1) and (2),

4x-10y+25x+10y=30-30

=>29x=0

=>x=0

From (1),

2x-5y=15

=>-5y=15

=>y= -3