Question

3x+4y=10 ; 2x-2y=4 solve

Answer 1

Answer:

x=18/7

y=4/7

Step-by-step explanation:

2x-2y=4

4x-4y=8

3x+4y=10

7x=18

x=18/7

2x-2y=4

36/7-2y=4

2y=36/7-4

   =36-28/7

   =8/7

y=4/y

Answer 2

Answer:

x = 2

y = 1

Step-by-step explanation:

3x+4y=10

and 2x−2y=2

or x−y=1

∴ x − y + 1

then

3( y+1 ) + 4y = 10

3y + 3 + 4y=10

7y=7

∴ y = 1

then

x = y+1 = 1+1 = 2

Hence,

x = 2

y = 1