Question

B) Solve any four of the following
​

Answer 1

Answer:

can u wait for sometime i will give u

Answer 2

Answer:

i have done sum no 1 , 3 , 4 ,5

1). 5/7 = 20/28 = 35/49

3).

2x+y=5

3x-y=5

adding both equations.

2x+y+3x-y=5+5

5x=10

x=2

2x+y=5

4+y=5

y=1

ans is x=2 and y=1

4).x+2y=7

3x-2y=-1

adding both equations

x+2y+3x-2y=7+(-1)

4x=6

x=6/4

x=3/2

5).2x+y=-2

3x-y=7

adding both equations

2x+y+3x-y=5

5x=5

x=1

2x+y=-2

2+y=-2

y=-4