Question

solve the simultaneous equations. 1) 2x+y=5 , 3x-y=5. 2) x-2y=-1 , 2x-y=7. 3) x+y=11 , 2x-3y=7. 4) 2x+y=-2 , 3x-y=7. 5)2x-y=5 , 3x+2y=11. 6) x-2y=-2 , x+2y=10 ​

Answer 1

Answer:

2x+y=5,both sides multiple by 3

then,6x+3y=15 ~1

3x-y=5, both sides multiple by 2

then ,6x-2y=10~2

equation , subtract 1-2

6x+3y=15

6x-2y=10

5y=5

y=1

6x+3×1=15

6x=12

x=2